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Atomic Number	49

Atomic Symbol	In

Atomic Weight	114.818 amu

Group	Other Metal, 13

Form	Solid

Density @ STP	7.31 g/cm³

Melting Point	156.60 °C (313.88 °F, 429.75 °K)

Boiling Point	2072 °C (3761.6 °F, 2345.15 °K)

Heat of Fusion	3.28 kJ/mol

Heat of Vaporization	230 kJ/mol

First Ionization Potential	5.78636 eV

Electronegativity (on Pauling scale	1.78

Specific Heat Capacity	0.233 J/g K

Ground State Electron Configuration	5p¹

Oxidation State(s)	+3

Stable Isotopes and Natural Abundance on Earth	¹¹³In, 4.3%; ¹¹⁵In, 95.7%

Selected Radioisotopes	¹¹¹In

Atomic Radius	156 pm

Crystal Structure	Tetragonal

Discovered by	Reich; Richter, 1863