Atomic Theory and Subatomic Particles

Front

What is the basic unit of matter?

Back

Atom

Front

What is the term for the number of protons in the nucleus of an atom?

Back

Atomic number

Front

Which subatomic particle has a positive charge?

Back

Proton

Front

Which subatomic particle has no charge?

Back

Neutron

Front

Which subatomic particle has a negative charge?

Back

Electron

Front

What is the center of an atom called?

Back

Nucleus

Front

What is the mass of a proton compared to an electron?

Back

Proton is much heavier than an electron.

Front

What is the term for atoms of the same element with different numbers of neutrons?

Back

Isotopes

Front

What is the smallest particle of an element that retains the properties of that element?

Back

Atom

Front

What is the charge of a neutron?

Back

Neutral (no charge)