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Element 49 - Indium (In) sound

From the indigo blue it shows in a pectroscope; discovered 1863. A metal used in engine bearings, in transistors, and as a "glue" that adheres to glass. It is too scarce for large-scale use, but a minuscule, long-lived indium battery has been devised to power new electronic wrist watches.

Properties

Atomic Number: 49
Atomic Weight: 114.82
Electron Configuration (at ground state): 1s22s22p63s23p63d104s24p64d105s25p1
Oxidation States (Bold most stable): +3
Boiling Point (K): 2350
Melting Point (K): 429.78
Density (at 300K -- g/cm3): 7.31
Atomic Volume (at 300K -- cm3/mol) 15.70
Number of stable isotopes: 1
Number of natural radioactive isotopes: 1
Mass Number (Bold naturally occurring) -- Half-Life -- Disintigration Type: 114 -- 19.51 days -- isomeric transition from upper to lower isomeric state
Covalent Radius (Å): 1.44
Atomic Radius (Å): 1.66
First Ionization Potential (V): 5.786
Electronegativity (Pauling's): 1.78
Specific Heat Capacity (at 300K -- J g-1 K-1): 0.233
Heat of Vaporization (kJ/mol): 226.35
Heat of Fusion (kJ/mol): 3.26
Electrical Conductivity (at 293K for polycrystalline material -- 106 (ohms)-1 cm-1): 3.4
Thermal Conductivity (at 300K -- W m-1 K-1): 81.6
Crystal Structure: Tetragonal
Acid-Base Properties: Amphoteric