In
Indium
Post TransitionAtomic Number: 49 • Atomic Mass: 114.8200 u • Period: 5 • Group: 13
Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p¹
Phase: Solid
Electronegativity: 1.78
Physical & Chemical Properties
Physical Properties
- •Soft, silvery-white, malleable and ductile metal
- •Low melting point (429.75 K or 156.6°C)
- •Can be cut with a knife
- •Makes a characteristic 'crying' sound when bent (like tin)
- •Remains liquid over a wide temperature range
Melting Point
429.75 K (156.60 °C, 313.88 °F)
Boiling Point
2345 K (2071.85 °C, 3761.33 °F)
Density
7.31 g/cm³
Electronegativity
1.78 (Pauling scale)
Chemical Properties
- •Main oxidation states are +1 and +3, with +3 being more common
- •Forms a thin protective oxide layer in air
- •Dissolves in acids but not in alkalis
- •Forms numerous organometallic compounds
- •Wets glass and can form a mirror similar to mercury
Electron Configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p¹Electron configuration describes how electrons are distributed in atomic orbitals, showing how they are arranged in energy levels and subshells.