Structure of the Atom

Front

What two particles make up the nucleus of an atom?

Back

Protons and Neutrons.

Front

What does the atomic number of an element represent?

Back

The number of protons in a single atom of that element.

Front

Who discovered the electron and what are the other subatomic particles?

Back

Thompson discovered the electron; the other subatomic particles are protons and neutrons.

Front

What particle moves around the nucleus of an atom?

Back

Electron.

Front

How can electrons be best described?

Back

Electrons have a very small size and a negative charge.

Front

What is the charge of a proton?

Back

Positive charge.

Front

What is the charge of a neutron?

Back

Neutral charge.

Front

What is the mass of an electron compared to protons and neutrons?

Back

Electrons have a very small mass compared to protons and neutrons.

Front

What is the nucleus of an atom composed of?

Back

Protons and Neutrons.

Front

What is the role of electrons in an atom?

Back

Electrons are involved in chemical bonding and reactions.