Name: Beryllium Symbol: Be Atomic Number: 4 Atomic Mass: 9.012182 amu Number of Protons/Electrons: 4 Number of Neutrons: 5 Date of Discovery: 1798 Discoverer: Fredrich Wohler Uses: spacecraft, missiles, aircraft Classification: Alkaline Earth
Calcium
Name: Calcium Symbol: Ca Atomic Number: 20 Atomic Mass: 40.078 amu Number of Protons/Electrons: 20 Number of Neutrons: 20 Date of Discovery: 1808 Discoverer: Sir Humphrey Davy Uses: life forms for bones and shells Classification: Alkaline Earth
Barium
Name: Barium Symbol: Ba Atomic Number: 56 Atomic Mass: 137.327 amu Number of Protons/Electrons: 56 Number of Neutrons: 81 Date of Discovery: 1808 Discoverer: Sir Humphrey Davy Uses: Medical applications, among others Classification: Alkaline Earth
Magnesium
Name: Magnesium Symbol: Mg Atomic Number: 12 Atomic Mass: 24.305 amu Number of Protons/Electrons: 12 Number of Neutrons: 12 Date of Discovery: 1808 Discoverer: Sir Humphrey Davy Uses: airplanes, missiles Classification: Alkaline Earth
Strontium
Name: Strontium Symbol: Sr Atomic Number: 38 Atomic Mass: 87.62 amu Number of Protons/Electrons: 38 Number of Neutrons: 50 Date of Discovery: 1790 Discoverer: A. Crawford Uses: flares, fireworks, crimson color Classification: Alkaline Earth
Radium
Name: Radium Symbol: Ra Atomic Number: 88 Atomic Mass: (226.0) amu Number of Protons/Electrons: 88 Number of Neutrons: 138 Date of Discovery: 1898 Discoverer: Pierre and Marie Curie Uses: treating cancer Classification: Alkaline Earth