49 In 114.818 Indium Post-transition metal

Soft enough to leave a mark on paper, and the transparent conductor in every touchscreen.

Atomic number
49
Atomic mass
114.818 u
Phase
Solid
Electron configuration
[Kr] 4d¹⁰ 5s² 5p¹
Melting point
429.75 K · 156.6 °C
Boiling point
2,345 K · 2,071.9 °C
Density
7.31 g/cm³
Electronegativity
1.78
Period / Group
5 / 13
Discovery year
1863
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