49
114.82
In
Indium
Identification
CAS Number: 7440-74-6
Discovery Year: 1863
Discoverer: Ferdinand Reich, T. Richter
Discovery Location: Germany
Properties
Atomic Dimensions
Atomic Radius: 155 pm →
Atomic Radius (Rahm): 246 pm
Covalent Radius: 142 pm →Van der Waals Radius: 193 pm
Metallic Radius: 142 pm
Atomic Volume: 15.7 cm³/mol
Lattice Constant: 4.59 Å
Thermodynamics
Electronic Structure
Electron Config: [Kr] 4d10 5s2 5p
Block: p
Period: 5 →Group: 13 →Electronegativity: 1.78 →Electron Affinity: 0.3 eV →Oxidation States: +3
Abundance & Geochemistry
Crust Abundance: 0.25 mg/kg
Sea Abundance: 0.02 mg/L
Goldschmidt Class: chalcophile
About
Soft silvery element belonging to group 13 of the periodic table. The most common natural isotope is In-115, which has a half-life of 6*10^4 years. Five other radioisotopes exist. Discovered in 1863 by Reich and Richter.
Isotopes
In-115 115 95.72%
In-113 113 4.28%
