Atomic Theory & Structure

Front

What is the charge of a proton?

Back

Positive charge (+1)

Front

What is the charge of an electron?

Back

Negative charge (-1)

Front

What is the charge of a neutron?

Back

Neutral (0)

Front

What are the three main subatomic particles?

Back

Electrons, Protons, Neutrons

Front

What is the nucleus of an atom?

Back

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

Front

What is atomic number?

Back

The number of protons in the nucleus of an atom.

Front

What is mass number?

Back

The total number of protons and neutrons in an atom's nucleus.

Front

What is an isotope?

Back

Atoms of the same element with different numbers of neutrons.

Front

What is the principle of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is a valence electron?

Back

An electron in the outermost shell of an atom that can participate in chemical bonding.