Name: Aluminum Symbol: Al Atomic Number: 13 Atomic Mass: 26.981539 amu Number of Protons/Electrons: 13 Number of Neutrons: 14 Date of Discovery: 1825 Discoverer: Hans Christian Oersted Classification: Other Metals
Indium
Name: Indium Symbol: In Atomic Number: 49 Atomic Mass: 114.818 amu Number of Protons/Electrons: 49 Number of Neutrons: 66 Date of Discovery: 1863 Discoverer: Ferdinand Reich Uses: coating of high-speed bearings Classification: Other Metals
Thallium
Name: Thallium Symbol: Tl Atomic Number: 81 Atomic Mass: 204.3833 amu Number of Protons/Electrons: 81 Number of Neutrons: 123 Date of Discovery: 1861 Discoverer: Sir William Crookes Uses: rat and ant poisons, detecting infrared radiation Classification: Other Metals
Bismuth
Name: Bismuth Symbol: Bi Atomic Number: 83 Atomic Mass: 208.98038 amu Number of Protons/Electrons: 83 Number of Neutrons: 126 Date of Discovery: Known to the ancients Discoverer: Unknown Uses: pharmaceuticals, fuses Classification: Other Metals
Gallium
Name: Gallium Symbol: Ga Atomic Number: 31 Atomic Mass: 69.723 amu Number of Protons/Electrons: 31 Number of Neutrons: 39 Date of Discovery: 1875 Discoverer: Paul Emile Lecoq de Boisbaudran Uses: semiconductor production Classification: Other Metals
Tin
Name: Tin Symbol: Sn Atomic Number: 50 Atomic Mass: 118.71 amu Number of Protons/Electrons: 50 Number of Neutrons: 69 Date of Discovery: Known to the ancients Discoverer: Unknown Name Origin: Latin Uses: coating for steel cans Classification: Other Metals
Lead
Name: Lead Symbol: Pb Atomic Number: 82 Atomic Mass: 207.2 amu Number of Protons/Electrons: 82 Number of Neutrons: 125 Date of Discovery: Known to the ancients Discoverer: Unknown Uses: solder and shielding against radiation, batteries Classification: Other Metals