Chemistry Chapter 1: Essential Ideas

Biochemistry is the study of

• properties, changes, and relationships between energy and matter.

• the chemistry of living things.

• crystals and minerals.

• carbon-containing compounds.

Which of the following is an extensive property of matter?

• melting point

• boiling point

• volume

• density

Which of the following is an intensive property of matter?

• amount of energy

• density

• volume

• mass

The two most important properties of all matter are

• the ability to carry an electric current well and to hold electric charge.

• taking up space and having mass.

• being brittle and hard.

• being malleable and ductile.

An atom is

• the smallest unit of matter that maintains it chemical identity.

• the smallest unit of a compound.

• always made of carbon.

• smaller than an electron.

A compound is

• a pure substance that cannot be broken down into simpler, stable substances.

• a substance, made of two or more atoms that are chemically bonded, that can be broken down into simpler, stable substances.

• the smallest unit of matter that maintains its chemical identity.

• any substance, whether it is chemically bonded or not.

A measure of the quantity of matter is

• density.

• weight.

• volume.

• mass.

Matter includes all of the following except

• air.

• light.

• smoke.

• water vapor.

Which of the following is not a physical change?

• grinding

• cutting

• boiling

• burning

Which of the following is not a chemical change?

• rusting

• igniting

• melting

• burning