Atomic Structure

Front

What is the nucleus of an atom?

Back

The nucleus is a tiny but very dense, positively charged portion of the atom that holds most of the atomic mass.

Front

What number indicates the nucleus?

Back

The number that indicates the nucleus is 4.

Front

What are subatomic particles with a negative charge called?

Back

Electrons are subatomic particles with a negative charge.

Front

What are subatomic particles with a positive charge called?

Back

Protons are subatomic particles with a positive charge.

Front

Which two subatomic particles make up the nucleus of an atom?

Back

The nucleus of an atom is made up of protons and neutrons.

Front

What is the charge of neutrons?

Back

Neutrons have no charge; they are neutral.

Front

What is the charge of protons?

Back

Protons have a positive charge.

Front

What is the role of electrons in an atom?

Back

Electrons are responsible for chemical bonding and reactions.

Front

What is atomic mass?

Back

Atomic mass is the weighted average mass of an atom's isotopes.

Front

What is an electron shell?

Back

An electron shell is a region around the nucleus where electrons are likely to be found.