Atomic Number
Group
Element
Bohr model
Electron
Neutron
Atom
Atomic Mass
Period
Proton
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 in the nucleus with a neutral, or no, charge.
A subatomic particle located on energy levels that has a negative charge.
The average mass of the protons plus the neutrons in an atom's nucleus.
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.
The smallest unit a substance can be divided into and still hold the properties of that substance.
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 in the nucleus with a positive charge.
The horizontal rows found on a periodic table.
