The neutral subatomic particles located in the nucleus of an atom

Atoms tend to gain, lose, or share electrons in order to achieve a full outer energy level

Loss or gaining of an electron changes and atom into __________.

Atoms that gain or lose a neutron become ____________.

An atomic diagram that shows protons, neutrons, and all electrons

Is a substance made up of only one kind of atom.

Is a classification of matter that includes both elements and compounds

Is the number of protons in an element

Is the protons plus the neutrons

The smallest particle in a chemical element or compound that has the chemical properties of that element or compound

Are molecules of two atoms of the same element. Elements found is nature this way are, H₂, O₂, N₂, F₂, Cl₂, Br₂ and I₂.