Tin

Tin is atom number 50 — every Tin atom has exactly 50 protons in its center, and that number is what makes it Tin and nothing else. Its symbol is Sn. At room temperature it is a solid.

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.

Summary from the source dataset, derived from Wikipedia (CC BY-SA 3.0) · original article

Tin sits in period 5, group 14 of the p-block. Its 50 electrons fill shells of 2, 8, 18, 18, 4 — written as [Kr] 4d10 5s2 5p2. Its electronegativity is 1.96 on the Pauling scale, and pulling the first electron off takes 708.6 kJ/mol. The outermost shell holds 4 electrons — the ones that do all the chemistry.

Full configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p2
Ionization energies (kJ/mol): 708.6, 1411.8, 2943, 3930.3, 7456
Electron affinity: 107.2984 kJ/mol · Electronegativity (Pauling): 1.96
Density: 7.365 g/cm³ · melts 505.08 K · boils 2875 K

Values exactly as published — see where the data comes from.