Atoms and the Period Table

Front

What subatomic particle has no charge?

Back

Neutrons

Front

What are columns on the periodic table called?

Back

Groups or families

Front

What are rows on the periodic table called?

Back

Periods

Front

What does the atomic mass tell us?

Back

The number of neutrons and protons combined.

Front

Approximately how many elements on the periodic table are metals?

Back

3/4 or three-fourths.

Front

What is an atom?

Back

The basic unit of a chemical element.

Front

What are protons?

Back

Positively charged subatomic particles found in the nucleus of an atom.

Front

What are electrons?

Back

Negatively charged subatomic particles that orbit the nucleus of an atom.

Front

What is the nucleus of an atom?

Back

The central part of an atom, containing protons and neutrons.

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom, which determines the element.