Structure of the Atom

Front

What is at the center of every atom?

Back

A nucleus

Front

Which two particles make up the nucleus of an atom?

Back

Protons and Neutrons

Front

What does an atomic number represent?

Back

The number of protons in an atom.

Front

What is the charge of a proton?

Back

Positive

Front

What is the charge of a neutron?

Back

Neutral

Front

What is the charge of an electron?

Back

Negative

Front

How many electrons does a neutral atom have if its atomic number is 8?

Back

8 electrons

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

What is the difference between an atom and a molecule?

Back

An atom is the smallest unit of an element, while a molecule is a group of two or more atoms bonded together.

Front

What is an isotope?

Back

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