Atom
Neutron
Element
Proton
Atomic Mass
Atomic Number
Group
Electron
Period
Bohr model
A subatomic particle located in the nucleus with a positive charge.
The horizontal rows found on a periodic table.
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.
The number of protons and the number of electrons found in one atom of an element.
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.
A subatomic particle located in the nucleus with a neutral, or no, charge.
A basic visual of a single atom with protons, neutrons, and electrons on energy levels. This model was designed by Neils Bohr.
The smallest unit a substance can be divided into and still hold the properties of that substance.
