Front

What is an atom?

Back

The smallest unit of an element, consisting of protons, neutrons, and electrons.

Front

What is a neutron?

Back

A subatomic particle found in the nucleus of an atom, with no electric charge.

Front

What is an ion?

Back

An atom or molecule that has gained or lost one or more electrons, resulting in a net charge.

Front

What is an isotope?

Back

Atoms of the same element that have different numbers of neutrons, resulting in different mass numbers.

Front

What charge does an atom have when it loses electrons?

Back

Positive charge.

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom, which determines the element.

Front

What is the mass number?

Back

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

Front

How do you determine the number of neutrons in an atom?

Back

Subtract the atomic number from the mass number.

Front

What is a cation?

Back

A positively charged ion, formed when an atom loses one or more electrons.

Front

What is an anion?

Back

A negatively charged ion, formed when an atom gains one or more electrons.