Periodic Table
50
Sn
118.71
Tin
Post-transitionInert pair effect (+2 vs +4); solder; bronze.
Electronic Configuration
[Kr] 4d¹⁰ 5s² 5p²or1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 4d¹⁰ 5s² 5p²
Electron shells
2e⁻n=1
8e⁻n=2
18e⁻n=3
18e⁻n=4
4e⁻n=5
Properties
Atomic number
50
Atomic mass
118.71 u
Category
Post-transition
Block / Group / Period
p · 14 · 5
Valence electrons
4
Oxidation states
+2, +4
Electronegativity
1.96
Atomic radius
145 pm
Ionization energy
709 kJ/mol
Electron affinity
107 kJ/mol
Melting point
505 K / 232 °C
Boiling point
2875 K / 2602 °C
Density
7.287 g/cm³
State at 25 °C
solid
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