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50 - Tin post-transition metal

Discovered by before 3500 BC in ~3500 BC

Tin

Tin is a chemical element with the symbol Sn (for Latin:stannum) and atomic number 50. It is a main group metal in group 14 of the periodic table. Tin shows a chemical similarity to both neighboring group-14 elements, germanium and lead, and has two possible oxidation states, +2 and the slightly more stable +4.
Shell Electrons Orbitals
1 2 2 in 1s
2 8 2 in 2s + 6 in 2p
3 18 2 in 3s + 6 in 3p + 10 in 3d
4 18 2 in 4s + 6 in 4p + 10 in 4d
5 4 2 in 5s + 2 in 5p
TinSn Electron 1 Electron 2 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 9 Electron 10 Electron 11 Electron 12 Electron 13 Electron 14 Electron 15 Electron 16 Electron 17 Electron 18 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 9 Electron 10 Electron 11 Electron 12 Electron 13 Electron 14 Electron 15 Electron 16 Electron 17 Electron 18 Electron 1 Electron 2 Electron 3 Electron 4
118.71  u Atomic Mass
1.7  Å Atomic Radius
2875  K Boiling Point
1.39  Å Covalent Radius
7.37  g/cm³ Density
107.3 Electron Affinity
1.96 Electronegativity
7.34  eV First Ionization Energy
505.21  K Melting Point
5 Number of Shells
4 Electron Valency
50 Atomic Number
2, 8, 18, 18, 4 Electron Shell Occupations
0.23  J/(g K) Specific Heat