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