AFOQT Physical Science
Exam 2023
The lowest possible temperature - Answer-Absolut Zero
The pressure exerted by the gases in the air. units of
... [Show More] measurement are kilopascals,
atmospheres, millimeters of mercury, and Torr - Answer-atmospheric Pressure
Pressure is 100 kPa, 1atm, 760 mm Hg or 760 Torr - Answer-standard atmospheric
pressure
the smallest particle of an element a nucleus and its surrounding electrons. - AnswerAtom
the mass of an atom measured in atomic mass units (amu). an atomic mass unit is
equal to one-twelfth of the atom of carbon-12. atomic mass is now more generally used
instead of atomic weight. Example: the atomic mass of chlorine is about 35amu. -
Answer-atomic mass
also known as proton number, it is the number of electrons or the number of protons in
an atom. example: the atomic number of gold is 79. - Answer-atomic number
a common term used to mean the average molar mass of an element. this is the mass
per mole of atoms. Ex: the atomic weight of chlorine is about 35g/mol - Answer-atomic
weight
the temperature at which a substance undergoes a phase change from a liquid to a gas.
- Answer-boiling point.
a temperature scale on which the freezing point of water is at 0 degrees and the normal
boiling point at standard atmospheric pressure is 100 degrees. - Answer-celsius scale
a change between two of the three states of matter, solid, liquid and gas. example when
water evaporates t changes from a liquid to a gaseous state. - Answer-change of state.
a chemical consisting of two or more elements chemically bonded together. example:
calcium can combine with carbon and oxygen to make calcium carbonate a compound
of all three elements. - Answer-compound
the formation of a liquid from a gas. this is a change of state, also called a phase
change. - Answer-condensation
the exchange of heat (heat conduction) by contact with another object, or allowing the
flow of electrons (electrical conduction) - Answer-conduction
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