Base (accepts H+).
18.
Their mutual attraction for shared electrons.
65/163.
Pure gold, as it is made of only gold atoms.
Atom.
By mass number, which is the total number of protons and neutrons in the nucleus.
90.
0.25M.
Overcoming intermolecular forces.
A neutral solution is obtained.
A slight positive charge.
A. increases.
By adding a base to water.
Ionic bond.
A unit of concentration expressed in moles of solute per liter of solution.
Hydrogen-1.
Hydrochloric acid (HCl).
The rem (roentgen equivalent man).
Solute.
Mixture.
Pond water temperature remains stable regardless of changing atmospheric temperature.
The process by which an unstable atomic nucleus loses energy by emitting radiation.
A homogenous mixture consisting of ions or molecules.
Alpha rays.
The shorter the half-life, the faster it disintegrates.
Solid, liquid, and gas.
They mix throughout the water to form a homogeneous mixture.
Beta particles have more penetrating power.
It dissolves, but the covalent bonds within glucose molecules do not dissociate.
Localized doses in excess of 200 rems.
A shorter half-life results in more radioactivity per amount detected.
To maintain adequate air quality and reduce radon concentration.
2, 8, 8, 2.
Potassium carbonate.
They all have 1 proton in their nucleus.
A unit of absorbed radiation dose.
pH less than 7.
Alpha particles are generally more harmful when internalized, but beta particles are more penetrating.
A notation that shows the valence electrons surrounding the atomic symbol.
Water has high heat capacity.
Water is an excellent solvent.
A mixture in which the components are so finely mixed that any one region has the same ratio of substances as any other region.
One rad is equal to 0.01 J of radiant energy absorbed per kilogram of tissue.
Partial positive charges on the hydrogens and a partial negative charge on the oxygen.
No more solute will dissolve in it.
Alpha, Beta, and Gamma rays.
The temperature of water in a pond stays relatively constant from day to night.
500 rems.
It has the ability to form crystals.
The combination of two protons and two neutrons, essentially the nucleus of a helium atom.
Sodium hydrogen carbonate.
Three isotopes.
The ionic bond between Na+ and Cl- dissociates.
Implement corrective measures such as sealing and ventilation.
NaCl.
0.0025M.
Only a fraction of 1 rem.
Pure sodium chloride consists of only NaCl compound.
Many polar and ionic substances.
Water molecules have strong cohesive forces due to their ability to form hydrogen bonds with one another.
The acidity or alkalinity of a solution.
Water behaves as an acid by donating a hydrogen ion.
Melting of ice to water.
Thyroid scans and treatment of thyroid cancer.
The uranium-238 decay series, which eventually leads to lead-206.
Basic Chemistry.
It seems to be a typographical error; possibly referring to a type of molecular attraction.
Matter that has a uniform and definite composition.
Alpha, Beta, and Gamma rays.
Unusually dense materials such as lead.
Millirem (mrem).
The arrangement of valence electrons.
Pure gold is represented as Au.
Gamma rays.
The series of transformations that a radioactive isotope undergoes until it reaches a stable state.
10 seconds.
A collection of two or more pure substances that are physically mixed.
The total number of hydronium ions must be the same as the total number of hydroxide ions.
2, 8, 8.
Isotope A is more radioactive.
In terms of its half-life.
Molecule B behaves as a base.
A weak attraction between a hydrogen atom and an electronegative atom.
The structure shows one carbon atom bonded to four hydrogen atoms, represented as H | H-C-H | H.
A beta particle is normally faster than an alpha particle.
The Latin word 'acidus', which means 'sour'.
Radon gas.
The presence of acids.
It kills microorganisms that lead to spoilage, extending the food's shelf life.
Lead-208.
Diagnosing tumors, investigating internal bleeding, and checking for internal injuries.
A few sheets of paper.
A sheet of aluminum.
Only 3 are stable.
264 stable isotopes.
An atom that has lost or gained one or more electrons.
It loses or gains electrons.
It takes a lot of energy to raise the temperature of water by a degree.
Rads (radiation absorbed dose).
Because it can carry nutrients, such as those in blood.
Sealing the basement floor and walls.
For a period of weeks.
An electron transfer occurs, resulting in the formation of two oppositely charged ions.
10 years.
Yes, each pure substance retains its own properties.
Acid (donates H+).
The genetic code of the individual's offspring may retain the mutation.
Using imaging to guide medical procedures, such as inserting catheters and small instruments.
pH greater than 7.
Molarity or moles per liter.
They become part of the material they are in, like any other electron.
No, the food does not become radioactive because gamma rays do not make the food itself radioactive; they kill bacteria and parasites without altering the food's atomic structure.
Yes, most kinds of molecular damage can be repaired if the radiation is not too severe.
Alpha particles are the least penetrating and can be stopped by a few sheets of paper.
They suffer structural damage.
Gamma rays.
Usually insignificant, but occasionally can lead to cells that do not function as well, potentially resulting in cancer.
It consists of visibly different substances or phases.
Wilhelm Roentgen, the discoverer of X-rays.
No, they do not dissociate.
An electrical attraction where atoms are held together by their mutual attraction for shared electrons.
It has the same biological effect as 10 rads of beta particles.
Acids.
A compound.
It has a bent overall structure.
A series of decays that occur as a radioactive isotope transforms into a stable isotope.
Any material made of only one type of atom.
The phase change from a gas/vapor to a liquid.
The thyroid's ability to absorb iodine.
A particle that can penetrate fairly deeply into skin and has the potential to harm or kill living cells.
An acid is any chemical that donates a hydrogen ion (H+).
Molecule A behaves as an acid.
About 1 million.
No, both Molecules A and B cannot behave as acids.
A narrow beam of x-rays that is quickly rotated around the body.
12.5% of the original sample.
A thin sheet of plastic or metal (such as aluminum).
92 protons.
126 neutrons.
Gamma (γ) rays.
100 degrees Celsius.
The elements are highly organized within the periodic table.
As milligrams of solute per liter of solution.
Solvent.
Electrons in the outermost shell of an atom that can participate in chemical bonding.
1 millirem is 1/1000 of a rem.
A pure material consists of only a single element or a single compound.
Lead blocks.
A hydrogen ion.
Beta rays.
About 50%.
By using the formula: Atomic Mass - Atomic Number.
Heat provides the energy needed for substances to change from one phase to another.
Isotope A has a half-life of 10 seconds, while Isotope B has a half-life of 10 years.
Gamma rays emitted by cobalt-60 or cesium-137.
The mutual attraction for shared electrons.
Water is a polar molecule.
No, the components cannot be seen as identifiable individual substances.
Isotope A is more radioactive because it has a shorter half-life.
Both are called 10 rems.
Highly focused beams of gamma rays are directed at a tumor.
2 (the atomic number of helium).
Molecules gain energy and move apart, leading to a change in phase.
Aluminum sulfate.
Less blood is lost when tumors are destroyed using the gamma knife.
Protons (H+ ions).
The time taken for half of an original quantity of an element to decay.
Due to its relatively large size and double positive charge (+2).
It indicates an isotope with a specific atomic mass and atomic number.
Ammonia behaves as a base by accepting a hydrogen ion from water.
The production of different isotopes or elements until a stable isotope is formed.
A hydrogen ion.
The formation of two oppositely charged ions.
People in brick, concrete, or stone buildings are exposed to greater amounts of radiation than those in wooden buildings.
Water can stick to substances other than itself.
The neutron has about the same mass as the proton.
Na + e- → Na+.
The structure shows two nitrogen atoms sharing three pairs of electrons, represented as N≡N.
Whether a solution is acidic, basic, or neutral.
It markedly lengthens the shelf life by killing microorganisms that cause spoilage.
The phase change from a liquid to a gas.
They pick up electrons and become harmless helium.
Throughout the liquid at the boiling point.
New cells arising from the damaged cell retain the altered genetic information, producing a mutation.
The quantity of solute dissolved in a solution.
More than 1 meter.
Beta rays.
Radium, uranium, and thorium.
Yes, normal cells can often repair much of the damage.
Alkaline.
Sodium hydroxide (NaOH).
It becomes a negatively charged ion (anion).
Mass number = Number of neutrons + Atomic number.
The hydronium ion concentration equals the hydroxide ion concentration.
Au.
0.33 mol.
As the negative logarithm of the hydronium ion concentration.
1.0 x 10^-7 M.
No, elements cannot be further decomposed.
0.6M.
The concentration of hydronium ions (H3O+).
7 noble gas shells.
Ammonia.
Surface tension.
0 to 14.
Ionic compound.
pH 7.
About 360 mrem.
It indicates a stronger acidity.
Half of the sample will be converted into other elements.
A beta particle is an electron ejected from a nucleus.
C6H12O6.
Alpha rays.
Kinetic energy decreases, leading to reduced movement and collisions of gas molecules.
Drain cleaner (often contains sodium hydroxide).
To kill bacteria and parasites, extending the shelf life and safety of the food.
If the dose is spread over a long period of time, allowing intervals for healing.
Using pH indicators and pH meters.
Gamma rays are the most penetrating and can penetrate several centimeters into solid lead.
Cancer.
The number of protons in an atom.
Inform their radiologist in advance.
3.82 days.
Protons and neutrons.
Outermost electron shell.
Neutral, acidic, or basic.
Tiny electrons in an electron cloud.
Because CH3COO- is less able to accommodate the negative charge.
pH = -log(10⁻⁷).
To organize and classify chemical elements based on their properties.
The molar concentration of hydronium ions.
Take the logarithm of the hydronium ion concentration and negate it.
They play a role in other biologically important molecules.
To organize and classify chemical elements based on their properties.
Yes, they are reversible.
Because they do not readily form chemical bonds with other atoms.
The hydronium ion concentration necessarily decreases.
It increases.
The phenomenon where some isotopes have unstable nuclei that spontaneously disintegrate, releasing high energy particles and/or electromagnetic radiation.
Significant quantities of radioactive isotopes, primarily trace amounts of uranium.
Light materials such as paper.
Sodium hydroxide (NaOH).
Dissociation.
H2O.
High-frequency electromagnetic radiation emitted by radioactive elements.
Sodium chloride (NaCl), or table salt.
Acidic, Basic, or Neutral.
1 day.
They can cause significant damage to internal organs if ingested or inhaled.
A combination of two or more substances that retain their individual properties.
Specific locations known for high levels of natural or man-made radioactivity.
-2
Gamma rays.
Harmless helium.
X-rays, protons, and other types of energy.
They can penetrate matter to a greater depth than alpha particles.
Sulfuric acid (H2SO4) reacts with potassium hydroxide (KOH) to produce potassium sulfate (K2SO4) and water (H2O).
Parts per million.
6 grams (2g/L * 3L).
The number of protons in an atom.
The stability of the negative ion that remains after the proton has been donated.
12 g/mol.
H₂O.
It increases with temperature.
It contains equal numbers of hydronium and hydroxide ions.
They are synthesized.
They allow water to have unique properties such as high surface tension and solvent capabilities.
Water.
An element is any material made of only one type of atom.
A molecular unit that acts as a single electrically charged group formed by clumped atoms.
Columns that contain elements with similar chemical behaviors.
To allow battlefield surgeons to X-ray wounded soldiers and operate more accurately.
Temperature increases.
It is heated as it absorbs radiation from these isotopes, powering volcanoes, geysers, and hot springs.
A branch of medicine that uses imaging technology to diagnose and treat disease.
Oxygen is better at attracting electrons than hydrogen.
A. Molecule B as a base; Molecule A as an acid.
H3PO4.
Beta particles are less damaging when outside the body due to their ability to penetrate skin, while alpha particles can cause more damage if ingested or inhaled.
Elements and compounds.
A computerized x-ray imaging procedure that produces cross-sectional images of the body.
They can harm or kill living cells.
Beta rays.
Homogeneous and heterogeneous mixtures.
Beta particles can readily pass through paper but cannot penetrate a sheet of aluminum.
The World Health Organization.
Because it is electrically neutral.
Hydrochloric acid (HCl) reacting with sodium hydroxide (NaOH) to form sodium chloride (NaCl) and water (H2O).
Alpha, Beta, Gamma.
Bitter taste and slippery feel.
26.
The number of neutrons.
154.
Tungsten.
Covalent bond.
Pure water.
1.0 x 10^-4 M.
Water is less dense as a solid than as a liquid.
The more acidic a solution is, the higher its hydronium ion concentration and the lower its pH.
Noble gases.
They make up the internal structure of atoms.
They are unreactive gases.
Petites Curies.
Bone.
Element's symbol, atomic number, and atomic mass.
Protons.
H2O is classified as a compound.
The tendency of a liquid’s surface to resist rupture when placed under tension or stress.
It forms hydronium ions.
1620 years.
Pure substances and mixtures.
It targets and destroys cancerous thyroid cells.
H2O.
The neutron has no electric charge.
Vinegar (contains acetic acid).
Any ionic compound formed from the reaction between an acid and a base.
Gamma rays are more harmful than alpha or beta particles.
Higher than 83 (bismuth).
As many as 14%.
Liquid droplets.
Alpha rays.
The United States.
2 grams of sucrose per liter of solution.
A chemical that accepts H+ ions.
Concentration = Amount of solute / Amount of solution.
They are arranged in wave-like entities within regions of space called electron shells.
A period.
In the atomic nucleus.
The number of protons equals the number of electrons.
The phase change from a solid to a gas.
8 ml.
Water.
Two hydrogen atoms.
Dissolving.
No, water is a compound made of more than one type of atom (H and O).
No, they only affect physical appearance.
John Dalton in the early 1800s.
Higher than 7.
It increases the concentration of hydroxide ions.
Neutrons.
Columns that contain elements with similar properties.
Because they are more convenient or have been used traditionally.
Convert grams to moles using the formula: moles = grams / molar mass.
No, it is constant and independent of any physical or chemical changes.
About 0.0000001 M for each.
2 valence electrons.
Acetic acid (CH₃COOH).
It loses 2 electrons, resulting in 2, 8, 8.
Ammonia (NH₃).
One-fourth of the original amount.
A diagnostic test using iodine-131 to visualize thyroid function.
Radioactivity.
Gamma rays have much greater energy than visible light, ultraviolet light, or X-rays.
238 nucleons.
Intramolecular forces.
The process by which unstable atomic nuclei lose energy by emitting radiation.
It has a uniform composition throughout.
Beta (β) rays.
To assess risks and manage exposure to radiation.
To make the particular organ or tissue under study more visible.
3 liters.
With a radon detector kit.
By accelerating electrons from the cathode that carry high kinetic energy.
They convert their kinetic energy to electromagnetic radiation (X-ray).
Radiation wasn’t dependent on the organization of atoms at the molecular level; it was happening inside the atom itself.
Atoms of the same element that contain the same number of protons but different numbers of neutrons in the nucleus.
Any pure substance that cannot be further decomposed or separated into other stable pure substances.
Any pure substance that can be further decomposed by a chemical change into two or more other pure substances.
0.05 mol.
They form a crystalline structure that spaces the molecules further apart.
It increases the particles' kinetic energy.
Yes, compounds can be decomposed by chemical changes.
144g.
It prevents ponds, lakes, and oceans from freezing solid, allowing life to thrive underneath.
From innermost to outermost.
That it destroyed diseased cells faster than healthy cells.
Heart rate.
Valence electrons.
A hydroxide ion.
Ammonium hydroxide.
99.985%.
On the surface of a solid when the temperature is low.
They release heat as temperature decreases.
The surface of a material, especially living tissue.
Amphoteric.
Sodium (Na) and Chlorine (Cl).
A single negative charge (-1).
The total mass of the atom(s), including protons, neutrons, and electrons.
Alpha (α) rays.
They can be replaced by new cells.
Radioactive, colorless, odorless, and tasteless gas.
Molecules are no longer attracted to each other and are free to move.
35 known isotopes.
A super-large number, 6.02 × 10^23, used to measure numbers of atoms or molecules.
A group.
Basic.
Atomic mass = number of neutrons + number of protons.
An atom.
The unequal sharing of electrons between hydrogen and oxygen.
Table sugar.
The Latin word 'aurum', meaning glow of sunrise.
Plasma sputter bombardment or high-temperature vacuum evaporation.
Orbiting around the oxygen atom.
To organize chemical elements based on their properties and atomic structure.
The hydroxide ion concentration is higher than the hydronium ion concentration.
Element's symbol, atomic number, and atomic mass.
The sum of protons and neutrons in the nucleus.
Hydrogen (H) and Oxygen (O).
The solution is neutral.
They allow atoms to form complex compounds with specific charges.
Element's symbol, atomic number, and atomic mass.
Water can behave as both an acid and a base.
Rows that indicate the number of electron shells in the elements.
Vessel.
To help health care providers see structures inside the body through imaging.
The interaction between an atom that loses electrons and an atom that gains them.
Water behaves as a very weak acid as well as a very weak base.
They have no mass or electric charge and possess high energies.
Rems.
Pure energy.
A chemical bond formed by the sharing of electron pairs between atoms.
25% of the original sample.
The food is not transformed into an emitter of radiation; it only receives radiation.
It has no net electric charge.
Internal organs, blood vessels, soft tissues, and bones.
Radon.
Molecules absorb heat and their kinetic energy increases.
They help doctors take tissue or fluid biopsies.
Gamma rays.
Because it seeps up through cracks in the floor.
Derived from the Arabic 'al-qali', meaning 'the ashes'.
The acidity or alkalinity of a solution.
Element.
Atoms were believed to be inert, indivisible, and solid.
Thin films of vaporized materials develop on various surfaces.
Very small particles that are building blocks for atoms.
The positive end of one water molecule is attracted to the negative end of another.
Electrons, Protons, Neutrons.
0.5L.
By their mass number.
Using the formula C1V1 = C2V2.
They disperse as a gas.
4 sets.
The process involving the decay of the atomic nucleus.
Rows that indicate the number of electron shells in the elements.
They contribute to the atomic mass and can vary among isotopes.
They speed up and move farther apart.
By increasing atomic number and similar chemical properties.
Valence shell.
Compounds have physical and chemical properties that are completely different from those of their elemental components.
It allows for smaller incisions (cuts).
An electrical attraction where atoms are held together by their mutual attraction for shared electrons.
NaCl (Sodium Chloride).
By multiplying the number of rads by a factor corresponding to different health effects of radiation.
[H3O+] = [OH–].
Water can behave as an acid or a base.
No, both Molecules A and B cannot behave as bases.
The process that happens on the surface of a liquid at any temperature.
No, treated food does not become an emitter of radiation.
Approximately 0.3123
By destroying the genetic material that controls how cells grow and divide.
An inert gas.
The maximum number of electrons each shell may contain.
6.02 × 10^23, which represents the number of atoms or molecules in one mole.
Nucleons.
7.
They behave similarly (although not identically).
Lower than 7.
The acidity of a solution.
Positive charge (+).
They differ only in mass, not electric charge.
Physical changes.
By increasing atomic number and similar chemical properties.
Negative charge (-).
By increasing atomic number and similar chemical properties.
A slight negative charge.
By increasing atomic number and similar chemical properties.
Radioactive isotopes found in the Earth's crust.
Identify the cation and anion in the compound.
It separates into sodium and chloride ions.
They neutralize the hydronium ions.
By adding an acid to water.
Element's symbol, atomic number, and atomic mass.
Solid, liquid, and gas.
Sodium Chloride.
Clinical studies on different types of radiation.
Severe damage.
A type of cancer treatment that uses beams of intense energy to kill cancer cells.
Alpha particles, beta particles, and gamma rays.
Because electrons are much less massive than the nucleus.
82 protons.
Several centimeters.
32 isotopes are radioactive.
Negatively charged.
Mass number equals the number of neutrons plus the atomic number.
They represent stable electron configurations.
0.0000001 M or 10⁻⁷ M.
115.
Ca: 2+ with two F: - each, represented as Ca[F][F].
Solid, Liquid, and Gas.
400 times more radioactive.
All atoms of an element are identical and have the same mass.
Indivisible (from 'atomos').
Different atoms of elements combined together in a fixed ratio.
The rearrangement of combinations of atoms.
Yes, it is electrically neutral overall.
High.
It decreases.
To treat tumors.
Radioisotopes that are not found in nature.
0 degrees Celsius.
They spontaneously disintegrate (decay) to become more stable.
HCl + NaOH → NaCl + H2O.
44.
Learning delay.
The number of protons in the nucleus.
Mass number = Neutrons + Protons.
Cross-sectional MRI images or 3D images that can be viewed from different angles.
As the amount of solute dissolved per amount of solution.
To destroy as few normal, healthy cells as possible.
Nausea, headaches, pain or burning at the injection site, hives, or itchy eyes.
The pH is 9.
Used in drain cleaners.
The number of electrons.
Because Cl- can accommodate the negative charge well.
When the X-ray strikes onto the film with a special coating.
Polonium and radium.
Polar covalent bond.
Al: 3+ with three O: - each, represented as Al[O][O].
Protons are about 1800 times as massive as electrons.
Isotopes share many characteristics due to having the same number of protons.
The solute must dissolve in the solvent to form a homogeneous mixture.
7.
Electrons.
The atom is the basic unit from which matter is constructed.
Iron-56, Iron-57, etc.
Methane.
NaCl.
Use the appropriate suffix for the anion based on its charge.
A hydroxide ion (OH–) is formed.
The presence of unstable nuclei.
The name of the element farther to the left is followed by the name of the element farther to the right, with the suffix –ide added to the latter.
It represents molar concentrations.
To remove ambiguity when compounds have different numbers of the same elements.
6.
Lithium Oxide.
Magnesium Oxide.
Inform their radiologist in advance.
Calcium Fluoride.
6.
A combination of Positron Emission Tomography and Computed Tomography.
The number of protons in each element listed in the periodic table.
It becomes a positively charged ion (cation).
Deposition.
[H₃O⁺] = [OH⁻].
Any material made of only one type of atom.
Tiny, indestructible building blocks called atoms.
Hydrogen bonds.
The use of X-rays.
Because ice is less dense than liquid water.
Neutralization.
The number of electrons is equal to the number of protons in the nucleus.
From a solid to a liquid.
They balance each other, producing a zero net charge.
Columns that contain elements with similar properties.
Glucose.
An acidic solution has a higher concentration of hydronium ions than hydroxide ions.
Water has a high heat of vaporization.
Molecules slow down and move closer together.
Kinetic energy increases.
It is converted from liquid form to steam.
Approximately the same.
Water.
Kinetic energy decreases.
It facilitates the transition between different states of matter.
B. 56 neutrons.
Hydrochloric acid (HCl).
1.0 x 10^-8 M.
Nuclear radiation.
To organize and classify chemical elements based on their properties.
In the nucleus.
If the compound contains a polyatomic ion, use its specific name.
Osteoporosis.
Temperature decreases.
Heat.
It temporarily realigns them.
Evaporative cooling.
They slow down and move closer together.
H2O.
To screen for breast cancer.
Carbon monoxide.
Sodium ions and hydroxide ions.
Protons, neutrons, and electrons.
58 grams.
Heat is either absorbed or released.
Freezing.
To cool off through sweating.
Blood.
23.
Because different tissues absorb different amounts of radiation.
Less than 7.
Computed Tomography or Computerized Axial Tomography.
44 protons.
Strontium Phosphide.
Tetra-.
Dinitrogen tetroxide.
They significantly influence the atom’s chemical properties.
Radioactive isotopes or radioisotopes.
Neutralization.
Negative.
A medical imaging technique that uses a magnetic field and computer-generated radio waves to create detailed images of organs and tissues.
Forming chemical bonds.
They neutralize the hydroxide ions.
Rows that indicate the number of electron shells in the elements.
Sodium hydroxide (NaOH).
8.
To visualize internal organs in real-time, including upper GI and barium enema procedures.
56 neutrons (100 - 44 = 56).
The outermost electron shell shows 4 valence electrons for carbon and 2 for each oxygen, with double bonds between carbon and each oxygen.
Salt and water.
Molarity = moles of solute / volume of solution in liters.
0.88 moles (calculated using the formula: moles = mass (g) / molar mass (g/mol)).
It has a high specific heat capacity.
Hydrogen Chloride.
White, because calcium in bones absorbs X-rays the most.
Mono- (usually omitted).
Di-.
Checking for fractures, spotting pneumonia, and mammograms for breast cancer.
16.
Sodium hydroxide (NaOH).
Rows that indicate the number of electron shells in the elements.
Electromagnetic radiation.
Positive.
Large, tube-shaped magnets.
[H3O+] = [OH–].
100.
Radioactivity.
Gray, because they absorb less radiation.
Black, because air absorbs the least radiation.
11.
Examining the brain and spinal cord, cancer screening, and examining heart, vascular, bone, and joint problems.
[H3O+] = 0.0000001 M = 10–7 M.
The concentration of hydronium ions increases.
The inside of your body.
Radioactive.
Compounds of nonmetals.
Atoms of the same element with different numbers of neutrons.
Its polarity.
Tri-.
They become weaker.
Carbon dioxide.
Yes, every element has at least one radioactive isotope or radioisotope.
No, it is not fully understood.
High energy particles and/or high energy electromagnetic radiation.
0.25 M (calculated using the formula: concentration = moles/volume).
Pressure.
Sodium chloride (NaCl).
Zero, because the number of protons equals the number of electrons.
0 degrees Celsius.
Bone scan, thyroid scan, and thallium cardiac stress test.
The outermost electron shell shows 2 valence electrons for magnesium and 7 for each chlorine, with ionic bonds between magnesium and each chlorine.
Heat is released as molecules slow down.
Ultrasound, plain x-rays, CT scans, fluoroscopy, MRI, mammography, nuclear medicine, and PET scans.
Hydrochloric acid (HCl).
The hydroxide ion concentration necessarily decreases.
They cause aligned atoms to produce faint signals.
Basic.
Magnetic Resonance Imaging.
It allows small objects to float and insects to walk on its surface.
Combine the names of the cation and anion to form the compound's name.
Columns that contain elements with similar properties.
Move around within a certain distance from other particles.
Heat is absorbed as molecules speed up.
Greater than 7.
59.
They form a crystalline structure, making ice less dense than liquid water.
Molecules speed up and expand.
Ultrasound.
pH = -log[H3O+] = 8.70 (the solution is basic).
It absorbs excess body heat, which is released into the atmosphere.
Attractive forces between them.
Nausea, headaches, pain or burning at the injection site, hives, or itchy eyes.
Mass number = Number of protons + Number of neutrons.
Mass number = Number of protons + Number of neutrons.
Wearing a lead apron to protect certain parts of the body.
To detect metabolic activity in tissues, often used in cancer diagnosis.
Sulfur trioxide.
