Period
Element
Proton
Neutron
Bohr model
Atomic Number
Atomic Mass
Group
Electron
Atom
A substance made of one type of atom found on the periodic table. These substances make up everything in the universe.
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.
A vertical column on the periodic table. It is also known as a family.
The horizontal rows found on a periodic table.
The average mass of the protons plus the neutrons in an atom's nucleus.
A basic visual of a single atom with protons, neutrons, and electrons on energy levels. This model was designed by Neils Bohr.
A subatomic particle located on energy levels that has a negative charge.
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.