Ch.8 Exam Review-PS

Front

What is the smallest particle of an element that retains the chemical identity of the element?

Back

An atom.

Front

What are most of the substances you see and use in everyday life?

Back

Mixtures.

Front

What is the process called when a solid changes directly to a gas?

Back

Sublimation.

Front

At what temperature is the random motion of molecules in a substance at a minimum?

Back

0 Kelvin.

Front

In which state of matter do intermolecular forces exert the least attractive force?

Back

Gases.

Front

Define a pure substance.

Back

A material with a constant composition and consistent properties throughout.

Front

What is a mixture?

Back

A combination of two or more substances that retain their individual properties.

Front

What is a compound?

Back

A substance formed when two or more elements are chemically bonded together.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is a group of two or more atoms bonded together.

Front

What happens during condensation?

Back

A gas turns into a liquid.