Front

What is atomic mass?

Back

The weighted average mass of an element's isotopes, measured in atomic mass units (amu).

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom, which determines the element's identity.

Front

How many protons does Boron have?

Back

5

Front

What is the atomic mass of Boron?

Back

11 amu.

Front

What are subatomic particles?

Back

Particles that make up an atom, including protons, neutrons, and electrons.

Front

What is the charge of a proton?

Back

Positive (+1).

Front

What is the charge of a neutron?

Back

Neutral (0).

Front

What is the charge of an electron?

Back

Negative (-1).

Front

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.

Front

What is an isotope?

Back

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