H2O.
154.
Ammonium hydroxide.
30.
They allow for the formation of compounds with distinct properties and charges.
[H3O+] = [OH–]
44 protons.
Sodium bicarbonate (sodium hydrogen carbonate).
Dissolving.
Potassium carbonate.
When the X-ray strikes onto the film with a special coating.
500 rems.
A molecular unit that acts as a single electrically charged group formed by atoms clumping together.
Localized doses in excess of 200 rems.
18 groups.
The rem (roentgen equivalent man).
About 50%.
Beta particles are less damaging when outside the body due to their ability to penetrate skin.
An electrical attraction where atoms are held together by their mutual attraction for shared electrons.
Approximately 0.3123
Basic.
8 ml.
It indicates a stronger acidity.
To help health care providers see structures inside the body through imaging.
The amount of iodine absorbed by the thyroid gland.
Salt and water.
Atoms of the same element that contain the same number of protons but different numbers of neutrons in the nucleus.
Higher than 7.
0.05 mol.
By mass number, which is the total number of protons and neutrons in the nucleus.
They pick up electrons and become harmless helium.
They are important in the structure and function of biologically significant molecules.
Au.
An atom that has lost or gained one or more electrons.
By adding an acid to water.
0 degrees Celsius.
Alpha rays.
By accelerating electrons from the cathode that carry high kinetic energy.
Tungsten.
It converts to electromagnetic radiation (X-ray).
Indivisible (from 'atomos').
Typically range from 6 to 8.
A pH of 7.
The genetic code of the individual's offspring may retain the mutation.
Rads (radiation absorbed dose).
0.33 mol.
1.0 x 10^-4 M.
0.0025M.
The ionic bond between Na+ and Cl- dissociates.
It helps in assessing risks and managing exposure to radiation.
0.6M.
Yes, each pure substance retains its own properties.
A pure material consists of only a single element or a single compound.
The phase change from a liquid to a gas.
An alteration in genetic information that can arise from a damaged DNA molecule.
1 proton.
The inside of your body.
Isotope A is more radioactive because it has a shorter half-life.
Any ionic compound formed from the reaction between an acid and a base.
A mole.
The structure shows two nitrogen atoms sharing three pairs of electrons, represented as N≡N.
Physical changes.
A hydrogen ion.
Sealing the basement floor and walls.
To maintain adequate air quality and reduce radon concentration.
The pH is 9.
John Dalton in the early 1800s.
The atom.
Any material made of only one type of atom.
Because Cl- can accommodate the negative charge well.
7.
It targets and destroys thyroid cancer cells.
HCl + NaOH → NaCl + H2O.
Hydrogen bonds.
A type of cancer treatment that uses beams of intense energy to kill cancer cells.
The United States (and many other countries).
Hydrogen-1.
The more basic a solution is, the lower its hydronium ion concentration.
The total mass of the atom(s), including protons, neutrons, and electrons.
It is converted from liquid form to steam.
Molarity or moles per liter.
In the nucleus.
An electrical attraction where atoms are held together by their mutual attraction for shared electrons.
They become part of the material they are in, like any other electron.
Water is less dense as a solid than as a liquid.
Mixture.
Water.
Mass number = Number of neutrons + Atomic number.
-2
44.
Clinical studies on different types of radiation.
They mix throughout the water to form a homogeneous mixture.
Deposition.
Many polar and ionic substances.
No, they do not dissociate.
Using the formula C1V1 = C2V2.
Because CH3COO- is less able to accommodate the negative charge.
A beta particle is an electron ejected from a nucleus.
0.0000001 M or 10⁻⁷ M.
Beta particles have more penetrating power.
About 0.0000001 M for each.
It has a higher concentration of hydronium ions than hydroxide ions.
Sodium hydroxide (NaOH).
Negatively charged.
Solid, liquid, and gas.
Isotope A has a half-life of 10 seconds, while Isotope B has a half-life of 10 years.
Throughout the liquid at the boiling point.
To destroy as few normal, healthy cells as possible.
No, it is constant and independent of any physical or chemical change.
Because it is electrically neutral.
10 seconds.
Sodium hydroxide (NaOH).
Sodium chloride (NaCl), or table salt.
About 360 mrem.
Alpha, Beta, and Gamma rays.
A hydrogen ion.
A super-large number, 6.02 × 10^23, used to measure numbers of atoms or molecules.
Whether a solution is acidic, basic, or neutral.
Solid, Liquid, and Gas.
A unit of absorbed radiation dose.
Beta rays.
The number of protons in each element listed in the periodic table.
The structure shows one carbon atom bonded to four hydrogen atoms, represented as H | H-C-H | H.
Alpha particles are generally more harmful when internalized, but beta particles are more penetrating.
Gamma rays.
Mass number equals the number of neutrons plus the atomic number.
No, they only affect physical appearance.
Using pH indicators and pH meters.
It refers to high-energy lead blocks used for shielding against radiation.
Compounds have physical and chemical properties that are completely different from those of their elemental components.
Yes, they are reversible.
A mixture in which the components are so finely mixed that any one region has the same ratio of substances as any other region.
By multiplying the number of rads by a factor corresponding to different health effects of radiation.
Tiny, indestructible building blocks called atoms.
Sodium and Chlorine.
Implement corrective measures such as sealing and ventilation.
Their mutual attraction for shared electrons.
The acidity or alkalinity of a solution.
1 millirem is 1/1000 of a rem.
Table sugar.
Atoms can clump together to form a molecular unit.
Rems.
The solute must dissolve in the solvent to form a homogeneous mixture.
Mass number = Neutrons + Protons.
The food is not transformed into an emitter of radiation; it only receives radiation.
The stability of the negative ion that remains after the proton has been donated.
Neutralization.
Radioactivity.
Negative charge.
Ammonia behaves as a base by accepting a hydrogen ion from water.
Specific locations known for high levels of natural or man-made radioactivity.
Beta particles can readily pass through paper but cannot penetrate a sheet of aluminum.
Water behaves as an acid by donating a hydrogen ion.
The number of protons in an atom.
To cool off through sweating.
1620 years.
Ionic compound.
The time taken for half of an original quantity of an element to decay.
The maximum number of electrons each shell may contain.
The Latin word 'aurum', meaning glow of sunrise.
Parts per million.
Solvent.
Derived from the Arabic 'al-qali', meaning 'the ashes'.
Cells that do not function as well as unaffected ones, sometimes leading to cancer.
Beta (β) rays.
Hydroxide ion concentration necessarily decreases.
65/163.
It contains equal numbers of hydronium and hydroxide ions.
A notation that shows the valence electrons surrounding the atomic symbol.
To organize and classify chemical elements based on their properties.
Water molecules have strong cohesive forces due to their ability to form hydrogen bonds with one another.
Neutralization.
pH greater than 7.
Computed Tomography or Computerized Axial Tomography.
For a period of weeks.
Aluminum sulfate.
NaCl (Sodium Chloride).
Millirem (mrem).
The acidity of a solution.
By using the formula: Atomic Mass - Atomic Number.
Unusually dense materials such as lead.
0.25M.
Very small particles that are building blocks for atoms.
Using imaging to guide medical procedures, such as inserting catheters and small instruments.
A period.
Water can behave as an acid or a base.
Gamma rays emitted by cobalt-60 or cesium-137.
Water has a high heat of vaporization.
A collection of two or more pure substances that are physically mixed.
Hydrochloric acid (HCl).
They can be replaced by new cells.
They differ only in mass, not electric charge.
pH = -log(10⁻⁷).
Acids.
A particle that can penetrate fairly deeply into skin and has the potential to harm or kill living cells.
Alkaline.
More than 1 meter.
Only the NaCl compound.
Nucleons.
Because different tissues absorb different amounts of radiation.
Molecules absorb heat and their kinetic energy increases.
Calcium in bones.
Water can behave as both an acid and a base.
Gray.
The use of X-rays.
Black, because air absorbs the least amount of X-rays.
By increasing atomic number and similar chemical properties.
They slow down and move closer together.
It represents molar concentrations.
The Latin word 'acidus', which means 'sour'.
The hydronium ion concentration necessarily decreases.
Only a fraction of 1 rem.
Wilhelm Roentgen, the discoverer of X-rays.
No, the components cannot be seen as identifiable individual substances.
As the negative logarithm of the hydronium ion concentration.
Gamma rays kill microorganisms that lead to spoilage, extending the food's shelf life.
Radon gas.
12 g/mol.
They behave similarly (although not identically).
Yes, most kinds of molecular damage can be repaired if the radiation is not too severe.
Positive charge.
The World Health Organization.
Hydrogen-1, Hydrogen-2 (Deuterium), and Hydrogen-3 (Tritium).
Highly focused beams of gamma rays are directed at a tumor.
Heat provides the energy needed for substances to change from one phase to another.
The neutron has no electric charge.
144g.
Electromagnetic radiation.
By destroying the genetic material that controls how cells grow and divide.
Hydrochloric acid (HCl) reacting with sodium hydroxide (NaOH) to form water and sodium chloride (NaCl).
One-fourth of the original amount.
Radioactive, colorless, odorless, and tasteless gas.
Yes, compounds can be decomposed by chemical changes.
They can penetrate matter to a greater depth compared to alpha particles.
Their mutual attraction for shared electrons.
Pure water.
An electron transfer occurs, resulting in the formation of two oppositely charged ions.
Regions of space where electrons vibrate, typically associated with noble gases.
Tiny electrons in an electron cloud.
The time required for half of the radioactive atoms in a sample to decay.
Alpha, Beta, Gamma.
The phase change from a solid to a gas.
By increasing atomic number and similar chemical properties.
Atoms of the same element with different numbers of neutrons.
126 neutrons.
Alpha particles can cause significant damage if ingested or inhaled.
By their atomic mass number.
100.
It markedly lengthens the shelf life by killing microorganisms that cause spoilage.
The number of neutrons.
Thyroid scans and treatment of thyroid cancer.
0.5L.
Amphoteric.
From a solid to a liquid.
12.5% of the original sample.
92 protons.
If the dose is spread over a long period of time, allowing intervals for healing.
Thyroid scan.
[H₃O⁺] = [OH⁻].
New cells arising from the damaged cell retain the altered genetic information, producing a mutation.
The quantity of solute dissolved in a solution.
They can cause significant damage to the surface of a material.
Protons and neutrons.
The pH increases.
High-frequency electromagnetic radiation emitted by radioactive elements.
They can move around within a certain distance from other particles.
Alpha (α) rays.
A compound.
Radium, uranium, and thorium.
Heat.
Yes, every element has at least one radioisotope.
2, 8, 8.
No more solute will dissolve in it.
pH 7.
Magnesium is in the center with two single bonds to two chlorine atoms.
Inform their radiologist in advance.
Any material made of only one type of atom.
Take the logarithm of the hydronium ion concentration and negate it.
Al: 3+; O: - - (three oxygen atoms each with 6 valence electrons).
Covalent bond.
They have no mass or electric charge and possess high energies.
Water is an excellent solvent.
No, treated food does not become an emitter of radiation.
It has the same biological effect as 10 rads of beta particles.
Water has high heat capacity.
The temperature of water in a pond stays relatively constant from day to night.
A beta particle is normally faster than an alpha particle.
Significant quantities of radioactive isotopes, primarily trace amounts of uranium.
Less blood is lost when tumors are destroyed using the gamma knife.
Protons, neutrons, and electrons.
A homogenous mixture consisting of ions or molecules.
Half of the sample will be converted into other elements.
It becomes a negatively charged ion (anion).
They are usually insignificant.
Concentration = Amount of solute / Amount of solution.
The process that happens on the surface of a liquid at any temperature.
They neutralize the hydroxide ions.
In terms of its half-life.
Matter that has a uniform and definite composition.
An inert gas.
Daughter isotopes, which are the products formed from the decay of parent isotopes.
It absorbs excess body heat, which is released into the atmosphere.
2 valence electrons.
100 degrees Celsius.
Nuclear radiation.
No, water is a compound made of more than one type of atom (hydrogen and oxygen).
2 grams of sucrose per liter of solution.
Mono- (usually omitted).
Alpha, Beta, and Gamma rays.
Different atoms of elements combined together in a fixed ratio.
Basic.
The rearrangement of combinations of atoms.
Protons are about 1800 times as massive as electrons.
Carbon monoxide.
The shorter the half-life, the faster it disintegrates.
Shorter half-lives result in more radioactivity per amount detected.
B. 56 neutrons.
A group.
The unequal sharing of electrons between hydrogen and oxygen.
Alpha particles are the least penetrating and can be stopped by a few sheets of paper.
Both are called 10 rems.
Alpha particles.
Radioactive isotopes found in the Earth's crust.
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.
Polar covalent bond.
It remains relatively constant despite changing atmospheric temperatures.
X-rays, protons, and other types of energy.
Freezing.
A thin sheet of plastic or metal (such as aluminum).
Only the gold element (Au).
A computerized x-ray imaging procedure that produces cross-sectional images of the body.
Temperature decreases.
They are arranged in wave-like entities within regions of space called electron shells.
Pure energy.
A slight negative charge.
Solute.
NaCl.
Because ice is less dense than liquid water.
Water is a polar molecule.
Molecules are free to move and do not have an ordered arrangement.
3.82 days.
Ca: 2+; F: - - (two fluorine atoms each with 7 valence electrons).
A combination of two or more substances that retain their individual properties.
Surface tension.
[H3O+] = [OH–].
7.
Acid (donates H+).
They cause aligned atoms to produce faint signals.
H3PO4.
It forms hydronium ions.
The molar concentration of hydronium ions.
Acidic, Basic, or Neutral.
25% of the original sample.
Lower than 7.
The positive end of one water molecule is attracted to the negative end of another.
Temperature increases.
The more acidic a solution is, the higher its hydronium ion concentration and the lower its pH.
A weak attraction between a hydrogen atom and an electronegative atom.
Gamma rays are the most penetrating and can penetrate several centimeters into solid lead.
A chemical bond formed by the sharing of electron pairs between atoms.
Water behaves as a very weak acid as well as a very weak base.
Basic Chemistry.
No, elements cannot be further decomposed.
Na + e- → Na+.
It increases.
H2O.
Water.
The process by which an unstable atomic nucleus loses energy by emitting radiation.
They can harm or kill living cells.
The series of decay processes that a radioactive isotope undergoes until it reaches a stable state.
10 years.
Gamma (γ) rays.
Isotope A will decay faster due to its shorter half-life.
It prevents ponds, lakes, and oceans from freezing solid, allowing life to thrive underneath.
1.0 x 10^-7 M.
It helps in dating materials and understanding the behavior of radioactive elements in nature.
Ammonia (NH3).
0.25 M (calculated as 0.50mol ÷ 2.00L).
Homogeneous and heterogeneous mixtures.
pH = -log(2.0 x 10^-9) = 8.70.
That it destroyed diseased cells faster than healthy cells.
Ammonia.
To treat tumors.
Positive charge (+).
It represents an isotope with a specific atomic mass and atomic number.
A branch of medicine that uses imaging technology to diagnose and treat disease.
The number of electrons it has.
Three types: Electrons, Protons, and Neutrons.
Because it can carry nutrients, such as those in blood.
Plasma sputter bombardment or high-temperature vacuum evaporation.
It seems to be a typographical error; possibly referring to a type of molecular attraction.
The total number of hydronium ions must be the same as the total number of hydroxide ions.
An atom.
They speed up and move farther apart.
Any pure substance that can be further decomposed by a chemical change into two or more other pure substances.
A hydroxide ion.
Atomic mass = number of neutrons + number of protons.
Higher than 83 (bismuth).
As the amount of solute dissolved per amount of solution.
Yes, isotopes share many characteristics despite differing in mass.
The number of protons equals the number of electrons.
Pure substances and mixtures.
Radioisotopes that are not found in nature.
A. increases.
Outermost electron shell.
Evaporative cooling.
0 to 14.
The outermost electron shell shows carbon in the center with two double bonds to oxygen atoms.
A hydroxide ion (OH–) is formed.
A neutral solution is obtained.
Partial positive charges on the hydrogens and a partial negative charge on the oxygen.
Petites Curies.
Lead-208.
Molecules are arranged tightly.
It temporarily realigns water molecules in the human body.
Zero.
Two hydrogen atoms.
Water can stick to substances other than itself.
H₂O.
56 neutrons (100 - 44 = 56).
Gamma rays are more harmful than alpha or beta particles.
They suffer structural damage.
238 nucleons.
It allows for smaller incisions (cuts).
Pure gold, as it is made of only gold atoms.
26.
Any pure substance that cannot be further decomposed or separated into other stable pure substances.
The neutron has about the same mass as the proton.
The number of protons in an atom.
By absorbing radiation from natural radioisotopes.
Kinetic energy increases.
Bitter taste and slippery feel.
People living in brick, concrete, or stone buildings are exposed to greater amounts of radiation than those in wooden buildings.
Sodium chloride (NaCl).
Gamma rays from a cobalt-60 source.
Because electrons are much less massive than the nucleus.
It becomes a positively charged ion (cation).
99.985%.
About 1 million.
Melting of ice into water.
Gamma rays have much greater energy than visible light, ultraviolet light, or X-rays.
A basic solution is one in which the hydroxide ion concentration is higher than the hydronium ion concentration.
Kinetic energy decreases.
Because it seeps up through cracks in the floor.
To organize chemical elements based on their properties and atomic structure.
A medical imaging technique that uses a magnetic field and computer-generated radio waves to create detailed images of organs and tissues.
Ultrasound.
By increasing atomic number and similar chemical properties.
It has a bent overall structure.
It increases with temperature.
Greater than 7.
Di-.
It indicates a neutral solution.
To screen for breast cancer.
The elements are highly organized.
It dissolves, but the covalent bonds within glucose molecules do not dissociate.
Thin films of vaporized materials develop on various surfaces.
As many as 14%.
One rad is equal to 0.01 J of radiant energy absorbed per kilogram of tissue.
It takes a lot of energy to raise the temperature of water by a degree.
No charge (neutral).
1.0 x 10 - 8 M.
A chemical that accepts H+ ions.
A single negative charge (-1).
To kill bacteria and parasites, extending the shelf life and safety of the food.
Orbiting around the oxygen atom.
Volcanoes, geysers, and hot springs.
Radon.
Neutral, acidic, or basic.
A slight positive charge.
Sulfuric acid (H2SO4) reacting with potassium hydroxide (KOH) to produce water and potassium sulfate (K2SO4).
The hydronium ion concentration equals the hydroxide ion concentration.
The acidity or alkalinity of a solution.
Bases accept acids and acids donate protons.
Positive.
Chemical elements based on their properties.
Sodium hydroxide (NaOH).
To make the particular organ or tissue under study more visible.
pH less than 7.
Checking for fractures, spotting pneumonia, and mammograms for breast cancer.
It increases the concentration of hydroxide ions.
A lead apron.
All atoms of an element are identical and have the same mass.
Columns that contain elements with similar properties.
Attractive forces between molecules.
Hydrogen (H) and Oxygen (O).
0 degrees Celsius.
Rows that indicate the number of electron shells in the elements.
The phase change from a gas/vapor to a liquid.
115.
It has no net electric charge.
It loses or gains electrons.
Protons (H+ ions).
Internal organs, blood vessels, soft tissues, and bones.
As milligrams of solute per liter of solution.
2, 8, 8, 2.
Ionic bond.
Molecules are no longer attracted to each other.
Radioactive decay.
H₂O.
Ultrasound, plain x-rays, CT scans, fluoroscopy, MRI, mammography, nuclear medicine, and PET scans.
An acid is any chemical that donates a hydrogen ion (H+).
Ionic bond.
Large, tube-shaped magnets.
Less than 7.
An element is any material made of only one type of atom.
A unit of concentration expressed in moles of solute per liter of solution.
Overcoming intermolecular forces.
82 protons.
By increasing atomic number and similar chemical properties.
Only 3 are stable.
Vessel.
32 isotopes are radioactive.
2 (the atomic number of helium).
Carbon dioxide.
Sulfur trioxide.
It allows small objects to float and insects to walk on its surface.
Melting.
It can transition to a higher energy state, such as from solid to liquid or liquid to gas.
Negative.
It has the ability to form crystals.
Diagnosing tumors, investigating internal bleeding, and checking for internal injuries.
Hydrochloric acid (HCl).
They help doctors take tissue or fluid biopsies.
Elements and compounds.
The formation of two oppositely charged ions.
Acetic acid.
It loses 2 valence electrons.
The arrangement of valence electrons.
Element's symbol, atomic number, and atomic mass.
Radioactive isotopes or radioisotopes.
Water.
The presence of acids.
Columns that contain elements with similar properties.
6 grams (2g/L * 3L).
Rows that indicate the number of electron shells in the elements.
7 noble gas shells.
Element's symbol, atomic number, and atomic mass.
From innermost to outermost.
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.
Heat is released as molecules slow down.
23.
6.
Strontium Phosphide.
Evaporation.
Yes, normal cells can often repair much of the damage.
They form a crystalline structure that spaces the molecules further apart.
In the atomic nucleus.
Yes, it is electrically neutral overall.
Sodium ions and hydroxide ions.
Approximately the same.
It separates into sodium and chloride ions.
C₆H₁₂O₆.
0.88 moles (calculated as 35.00g ÷ 40.00g/mol).
With a radon detector kit.
Base (accepts H+).
Element symbols, atomic numbers, and atomic masses.
3 liters.
Bone.
Alpha rays.
High pressure.
Atoms were believed to be inert, indivisible, and solid.
Columns that contain elements with similar chemical properties.
A combination of Positron Emission Tomography and Computed Tomography.
Temperature decreases lead to a decrease in kinetic energy and movement of gas molecules.
Dinitrogen tetroxide.
Magnesium Oxide.
Electrons in the outermost shell of an atom that can participate in chemical bonding.
Used in drain cleaners.
To remove ambiguity when compounds have different numbers of the same elements.
By adding a base to water.
[H3O+] = 0.0000001 M = 10–7 M.
The number of protons in the nucleus.
Compounds of nonmetals.
Nausea, headaches, pain or burning at the injection site, hives, or itchy eyes.
To allow surgeons to X-ray wounded soldiers and operate more accurately.
Unstable nuclei.
Element.
No, they are not fully understood.
Atom.
On the surface of a solid when the temperature is low.
They spontaneously disintegrate (decay) to become more stable.
Osteoporosis.
Regulation.
Heat is absorbed as molecules speed up.
6.
Element's symbol, atomic number, and atomic mass.
The tendency of a liquid’s surface to resist rupture when placed under tension or stress.
To organize chemical elements based on their properties and atomic structure.
Noble gases.
Cross-sectional MRI images or 3D images that can be viewed from different angles.
Beta rays.
Heat is either absorbed or released.
Gamma rays.
Blood.
They release heat as temperature decreases.
Valence electrons.
Intramolecular forces.
It facilitates the transition of molecules between different states.
To visualize the movement of internal structures, including upper GI and barium enema.
It has a uniform composition throughout.
Magnetic Resonance Imaging (MRI).
Tri-.
Methane.
Tetra-.
Glucose.
A. Molecule B as a base; Molecule A as an acid.
264 stable isotopes.
Sodium Chloride.
Greater than 7.
Forming chemical bonds.
Because it is better at attracting electrons.
Columns that contain elements with similar chemical properties.
NaCl.
It increases the particles' kinetic energy.
58 grams.
They disperse as a gas.
Convert grams to moles using the formula: moles = grams / molar mass.
90.
Molecule A behaves as an acid.
Molecule B behaves as a base.
No, both Molecules A and B cannot behave as acids.
59.
11.
They neutralize the hydronium ions.
Rows that indicate the number of electron shells in the elements.
It consists of visibly different substances or phases.
H2O is classified as a compound.
Inform their radiologist in advance.
4 sets.
Polonium and radium.
Examining the brain and spinal cord, cancer screening, and examining heart, vascular, bone, and joint problems.
High energy particles and/or high energy electromagnetic radiation.
Valence shell.
8.
Calcium Fluoride.
Radiation wasn't dependent on the organization of atoms at the molecular level; something was happening inside the atom itself.
They are unreactive gases.
Bone scan, thyroid scan, and thallium cardiac stress test.
The phenomenon where some isotopes have unstable nuclei that spontaneously disintegrate, releasing high energy particles and/or electromagnetic radiation.
Molecules slow down and move closer together.
They significantly influence the atom's chemical properties.
Less than 7.
They balance each other, producing a zero net charge.
No, both Molecules A and B cannot behave as bases.
Polarity, leading to hydrogen bonding.
Solid, liquid, and gas.
Negative charge (-).
400 times more radioactive.
Beta rays.
Gamma rays.
16.
The combination of two protons and two neutrons, essentially the nucleus of a helium atom.
Approximately 6.9 moles per liter.
Rows that indicate the number of electron shells in the elements.
Molecules speed up and expand.
Lithium Oxide.
It expands and becomes less dense.
Nausea, headaches, pain or burning at the injection site, hives, or itchy eyes.
Because they do not readily form chemical bonds with other atoms.
They are synthesized.
Light materials such as paper.
Because of its uneven distribution of electron density.
Positron Emission Tomography.
It has a high specific heat capacity.
The number of electrons is equal to the number of protons in the nucleus.
Radioactive.
Liquid droplets.
Mass number = Number of protons + Number of neutrons.
Mass number = Number of protons + Number of neutrons.
Alpha rays.
Due to its relatively large size and double positive charge (+2).
Hydrogen Chloride.
Radioactivity.
