Element
Atom
Proton
Group
Atomic Mass
Bohr model
Atomic Number
Electron
Period
Neutron
A subatomic particle located on energy levels that has a negative charge.
A substance made of one type of atom found on the periodic table. These substances make up everything in the universe.
The average mass of the protons plus the neutrons in an atom's nucleus.
A vertical column on the periodic table. It is also known as a family.
A basic visual of a single atom with protons, neutrons, and electrons on energy levels. This model was designed by Neils Bohr.
The horizontal rows found on a periodic table.
The smallest unit a substance can be divided into and still hold the properties of that substance.
A subatomic particle located in the nucleus with a neutral, or no, charge.
The number of protons and the number of electrons found in one atom of an element.
A subatomic particle located in the nucleus with a positive charge.
