Atoms & Molecules

Front

What is the basic unit of matter?

Back

An atom is the basic unit of matter.

Front

What are the three main particles that make up an atom?

Back

Protons, neutrons, and electrons.

Front

What shape does table salt (NaCl) form at the atomic level?

Back

A cube.

Front

How many hydrogen atoms are in a water molecule (H2O)?

Back

2 hydrogen atoms.

Front

How many carbon atoms are in a methane molecule (CH4)?

Back

1 carbon atom.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

Front

What is the chemical formula for water?

Back

H2O.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the charge of an electron?

Back

Negative.

Front

What is the charge of a neutron?

Back

Neutral (no charge).