Front

What is the atomic number of an atom?

Back

The atomic number is the number of protons in its nucleus.

Front

What is the positively charged particle in an atom’s nucleus?

Back

The positively charged particle in an atom’s nucleus is the proton.

Front

What particle orbits around the nucleus of an atom?

Back

The particle that orbits around the nucleus is the electron.

Front

Which letter represents an electron in a diagram?

Back

C represents an electron.

Front

What two particles account for almost all of the mass of an atom?

Back

The neutron and proton account for almost all of the mass of an atom.

Front

What is an atom?

Back

An atom is the basic unit of matter, consisting of a nucleus surrounded by electrons.

Front

What are neutrons?

Back

Neutrons are neutral particles found in the nucleus of an atom.

Front

What are protons?

Back

Protons are positively charged particles found in the nucleus of an atom.

Front

What is the role of electrons in an atom?

Back

Electrons are negatively charged particles that orbit the nucleus and are involved in chemical bonding.

Front

What is the nucleus of an atom?

Back

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