Atoms and Elements

Front

What is an atom?

Back

The smallest unit of an element that retains the properties of that element.

Front

What is an element?

Back

A pure substance made of only one type of atom.

Front

What is the periodic table?

Back

A chart that organizes all known elements by their atomic number and properties.

Front

What is a subatomic particle?

Back

Particles that make up an atom, including protons, neutrons, and electrons.

Front

What charge does a proton have?

Back

Positive charge.

Front

What charge does a neutron have?

Back

No charge (neutral).

Front

What charge does an electron have?

Back

Negative charge.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is a chemical symbol?

Back

A one or two-letter abbreviation used to represent an element.

Front

What are noble gases?

Back

Elements in group 18 of the periodic table that are colorless, odorless, and inert.