Atomic Mass:The mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom.
Alkaline Earth Metals: A group of chemical elements in the periodic table with very similar properties. They are all shiny, silvery-white metals that includes beryllium.
Periodic Table:A tabular arrangement of chemical elements, organized based on their atomic number, electron configuration, and recurring properties.