ATDH EXAM REVIEW CHEMISTRY
EXAM QUESTIONS AND ANSWERS
100% VERIFIED
Acid - ANSWER-a chemical species that accepts electrons or donate protons or
hydrogen ions.
active transport - ANSWER-the movement of ions or molecules across a cell membrane
into a region of higher concentration, assisted by enzymes and requiring energy.
anion - ANSWER-an ion with a negative electrical charge.
atom - ANSWER-Smallest particle of an element
atomic mass - ANSWER-average mass of atoms of an element.
atomic weight - ANSWER-the number of protons plus the number of neutrons
Avogadro's number - ANSWER-6.02 x 10^23
base - ANSWER-A substance that decreases the hydrogen ion concentration in a
solution.
heterogeneous - ANSWER-consisting of dissimilar components
heterogeneous mixture - ANSWER-A mixture that is not uniform in composition;
components are not evenly distributed throughout the mixture
heterogeneous reaction - ANSWER-chemical reaction in which reactants are different
phases from each other.
bond - ANSWER-a chemical link formed between atoms in molecules and molecules
and ions.
Boyle's law - ANSWER-ideal gas law that states the volume of a gas is inversely
proportional to its absolute pressure, assuming constant temperature.
catalyst - ANSWER-substance that increases the chemical reaction rate by decreasing
its activation energy
cation - ANSWER-ion with a positive electrical charge.
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