Protons, Neutrons, Electrons, & Mass Number

Finding Protons, Neutrons, Mass Number, Electrons, and Atomic Number

The essential concepts of mass number, average atomic mass, and how to find protons, neutrons, electrons, and atomic number using the periodic table.

Finding the Protons, Neutrons, Electrons, & Mass Number for Ions

More practice with a focus on how ions (atoms with positive and negative charges).