Atomic Theory & Structure

Front

What is the nucleus of an atom?

Back

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

Front

What particles are found in the nucleus?

Back

Protons and neutrons.

Front

What charge do protons carry?

Back

Protons carry a positive charge.

Front

What charge do neutrons carry?

Back

Neutrons carry no charge (they are neutral).

Front

What did J.J. Thomson discover about atoms?

Back

He discovered that atoms contain negatively charged particles, known as electrons.

Front

What is the mass of a neutron compared to a proton?

Back

A neutron has a mass approximately equal to that of a proton.

Front

What is the overall charge of an atom?

Back

An atom is electrically neutral because it has an equal number of protons and electrons.

Front

What did Ernest Rutherford discover?

Back

Rutherford discovered the nucleus of the atom through his gold foil experiment.

Front

What is the role of electrons in an atom?

Back

Electrons are negatively charged particles that orbit the nucleus and are involved in chemical bonding.

Front

How many milliliters are in one liter?

Back

1 L = 1000 mL.