Indium

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Indium
49In
Ga

In

Tl
cadmiumindiumtin
Ìhànsójú
silvery lustrous gray
Àwọn ìdámọ́ wíwọ́pọ̀
Orúkọ, àmì-ìdámọ́, nọ́mbà indium, In, 49
Ìpèlóhùn /ˈɪndiəm/ IN-dee-əm
Ẹ̀ka ẹ́límẹ̀nti post-transition metal
Ẹgbẹ́, àsìkò, àdìpò 135, p
Ìwúwo átọ́mù 114.818
Ìtòléra ẹ̀lẹ́ktrónì [Kr] 4d10 5s2 5p1
2, 8, 18, 18, 3
Physical properties
Phase solid
Density (near r.t.) 7.31 g·cm−3
Liquid density at m.p. 7.02 g·cm−3
Melting point 429.7485 K, 156.5985 °C, 313.8773 °F
Boiling point 2345 K, 2072 °C, 3762 °F
Heat of fusion 3.281 kJ·mol−1
Heat of vaporization 231.8 kJ·mol−1
Molar heat capacity 26.74 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 1196 1325 1485 1690 1962 2340
Atomic properties
Oxidation states 3, 2, 1 (amphoteric oxide)
Electronegativity 1.78 (Pauling scale)
Ionization energies 1st: 558.3 kJ·mol−1
2nd: 1820.7 kJ·mol−1
3rd: 2704 kJ·mol−1
Atomic radius 167 pm
Covalent radius 142±5 pm
Van der Waals radius 193 pm
Miscellanea
Crystal structure tetragonal
Indium has a tetragonal crystal structure
Magnetic ordering diamagnetic[1]
Electrical resistivity (20 °C) 83.7 nΩ·m
Thermal conductivity 81.8 W·m−1·K−1
Thermal expansion (25 °C) 32.1 µm·m−1·K−1
Speed of sound (thin rod) (20 °C) 1215 m·s−1
Young's modulus 11 GPa
Mohs hardness 1.2
Brinell hardness 8.83 MPa
CAS registry number 7440-74-6
Àwọn ísótòpù dídúró jùlọ
Main article: Àwọn ísótòpù indium
iso NA half-life DM DE (MeV) DP
113In 4.3% 113In is stable with 64 neutrons
115In 95.7% 4.41×1014 y β 0.495 115Sn
· r


Itokasi[àtúnṣe | àtúnṣe àmìọ̀rọ̀]

  1. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.