Atomic Theory & Structure

Front

What is the charge of a proton?

Back

Positive

Front

What is the charge of an electron?

Back

Negative

Front

What is the charge of a neutron?

Back

Neutral

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

What is the role of electrons in an atom?

Back

Electrons are involved in chemical bonding and reactions.

Front

What did Rutherford's gold foil experiment demonstrate?

Back

The existence of a small, dense nucleus at the center of the atom.

Front

What is nuclear decay?

Back

The process by which an unstable atomic nucleus loses energy by emitting radiation.

Front

What is the principle of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is an isotope?

Back

Atoms of the same element with the same number of protons but different numbers of neutrons.