Development of the Atomic Theory

Front

What is the atomic theory?

Back

A scientific theory that explains the nature of matter, stating that all matter is composed of atoms.

Front

What is an atom?

Back

The smallest unit of an element that retains the properties of that element.

Front

What are the three main subatomic particles?

Back

Protons, neutrons, and electrons.

Front

What charge does a proton have?

Back

Positive charge.

Front

What charge does an electron have?

Back

Negative charge.

Front

What charge does a neutron have?

Back

No charge (neutral).

Front

What is the nucleus of an atom?

Back

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

Front

What is an isotope?

Back

An atom with the same number of protons but different numbers of neutrons.

Front

Who proposed the nuclear model of the atom?

Back

Ernest Rutherford.

Front

What did Rutherford's gold foil experiment demonstrate?

Back

That atoms have a small, dense nucleus.