Unit 2 - The Atom

Front

What is the nucleus of an atom?

Back

The very small dense region in the center of an atom that contains all the positive charge and most of the mass.

Front

What is an electron?

Back

The negatively charged subatomic particle of an atom.

Front

What is a neutron?

Back

A neutral particle located in the nucleus with a charge of zero.

Front

What are isotopes?

Back

Atoms of the same element with identical atomic numbers but different atomic masses due to different numbers of neutrons in the nucleus.

Front

What is a proton?

Back

The positively charged subatomic particle contained in the nucleus of an atom.

Front

What are subatomic particles?

Back

The three kinds of particles that make up atoms: protons, neutrons, and electrons.