Atomic Theory and Periodic Table Vocab

Front

What is atomic number?

Back

The number of protons in an atom's nucleus.

Front

What is an electron cloud?

Back

A region around the nucleus occupied by electrons.

Front

What charge do neutrons have?

Back

They have no charge.

Front

What is an element?

Back

A substance that consists of only one type of atom.

Front

What is the nucleus of an atom?

Back

The central part of an atom containing protons and neutrons.

Front

What are protons?

Back

Subatomic particles with a positive charge found in the nucleus.

Front

What are electrons?

Back

Negatively charged subatomic particles that orbit the nucleus.

Front

What is the atomic mass?

Back

The weighted average mass of an element's isotopes.

Front

What is a chemical symbol?

Back

A one or two-letter representation of an element.

Front

What is the periodic table?

Back

A tabular arrangement of elements based on their atomic number.