Front

What are the three main particles of an atom?

Back

Protons, neutrons, and electrons.

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 determines the identity of an element?

Back

The number of protons in the nucleus.

Front

What are valence electrons?

Back

The number of electrons in the outermost orbital.

Front

What is the mass of a proton?

Back

1 atomic mass unit (amu).

Front

What is the mass of a neutron?

Back

1 atomic mass unit (amu).

Front

What is the mass of an electron?

Back

Approximately 1/1836 amu.

Front

Where are protons located in an atom?

Back

In the nucleus.