atomic mass and isotopes

Front

What is atomic mass?

Back

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

Front

What are isotopes?

Back

Isotopes are variants of a chemical element that have the same number of protons but different numbers of neutrons.

Front

How do you calculate the mass number of an atom?

Back

The mass number is calculated by adding the number of protons and neutrons in the nucleus of an atom.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of a neutron?

Back

A neutron has no charge (it is neutral).

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

How many protons does titanium have?

Back

Titanium has 22 protons.

Front

How many neutrons does lithium-7 have?

Back

Lithium-7 has 4 neutrons.

Front

What is the mass of a proton?

Back

The mass of a proton is approximately 1 amu.

Front

What is the mass of a neutron?

Back

The mass of a neutron is approximately 1 amu.