Subatomic Particles

Front

What is atomic mass?

Back

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

Front

What charge does a proton have?

Back

A proton has a positive charge.

Front

Which subatomic particle determines the identity of an element?

Back

The proton determines the identity of an element.

Front

What is the charge of a neutron?

Back

A neutron has no charge.

Front

How many protons are in a neutral atom of Calcium (atomic number 20)?

Back

20 protons.

Front

How many electrons are in a neutral atom of Calcium (atomic number 20)?

Back

20 electrons.

Front

How many neutrons are in a neutral atom of Calcium with a mass number of 40?

Back

20 neutrons.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus of an atom.

Front

What is the difference between an electron and a proton?

Back

An electron has a negative charge, while a proton has a positive charge.

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom, containing protons and neutrons.