Mastery Peak : Isotopes and Average Atomic Mass

Front

What is an ion?

Back

A charged atom that has lost or gained one or more electrons.

Front

Do Aluminum-27 and an atom with 14 protons and 13 neutrons belong to the same element?

Back

No, because they have different numbers of protons.

Front

How is atomic mass represented on the periodic table?

Back

As an average of the mass of different isotopes.

Front

What is the atomic number of Neon (Ne)?

Back

10.

Front

What does a neutral atom of the isotope 26Mg consist of?

Back

12 protons, 14 neutrons, and 12 electrons.

Front

What are isotopes?

Back

Atoms of the same element that have different numbers of neutrons.

Front

How do you calculate average atomic mass?

Back

By taking the weighted average of the masses of an element's isotopes.

Front

What is the significance of the atomic number?

Back

It determines the identity of an element and the number of protons in its nucleus.

Front

What is the difference between mass number and atomic mass?

Back

Mass number is the total number of protons and neutrons, while atomic mass is the weighted average of all isotopes.

Front

What is a neutron?

Back

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