Atomic Number and Atomic Mass

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the atomic mass?

Back

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

Front

How do you calculate the number of neutrons in an atom?

Back

Number of Neutrons = Atomic Mass - Atomic Number.

Front

What particle has a positive charge?

Back

Proton.

Front

What particle has a negative charge?

Back

Electron.

Front

What particle has no charge?

Back

Neutron.

Front

What is the relationship between atomic number and protons?

Back

The atomic number is equal to the number of protons in an atom.

Front

What is the atomic number of fluorine?

Back

9.

Front

Which element has an atomic number of 20?

Back

Calcium.

Front

What is the formula to find the number of neutrons?

Back

Mass - Atomic Number = Neutrons.