Matter and Atoms TEST

Front

Elements are pure substances made of ______ atoms

Back

like

Front

Is NO2 an element or a molecule?

Back

molecule

Front

What is a compound?

Back

A molecule that is formed from two different elements/atoms.

Front

What type of mixture is this?

Back

heterogeneous mixture

Front

Most elements can be combined with another element with a chemical bond and now the elements are called __________.

Back

Molecules

Front

What is an atom?

Back

The basic unit of a chemical element.

Front

What are the three main subatomic particles?

Back

Protons, neutrons, and electrons.

Front

What is a homogeneous mixture?

Back

A mixture that has a uniform composition throughout.

Front

What is the nucleus of an atom?

Back

The center of an atom, containing protons and neutrons.

Front

What is a chemical bond?

Back

A lasting attraction between atoms that enables the formation of chemical compounds.