Hair/Skin and Chemistry, too!

The study of substances that contain carbon is called _____ chemistry.

• organic

• inorganic

• structural

• natural

Substances lacking the element _____ are classified as inorganic.

• hydrogen

• carbon

• silicon

• oxygen

Matter does NOT exist in which form?

• solid

• liquid

• gas

• energy

Any substance that occupies space and has mass (weight) is considered:

• carbon

• matter

• energy

• light

The simplest form of chemical matter is a(n):

• atom

• cell

• element

• neutron

There are _____ naturally occurring elements.

• 118

• 98

• 79

• 131

A(n) _____ is the basic unit of matter.

• molecule

• proton

• cell

• atom

A(n) _____ is a chemical combination of two or more atoms in definite (fixed) proportions.

• element

• cell

• molecule

• ion

An elemental molecule is a molecule containing:

• two or more atoms of two different elements in definite proportions

• two or more atoms of the same element in indefinite proportions

• a single atom

• two or more atoms of the same element in definite proportions

A chemical combination of two or more atoms of different elements in definite proportions is a(n):

• ion

• compound

• elemental molecule

• element