Template:Infobox gallium

Chemical element, symbol Ga and atomic number 31
Gallium, 31Ga
File:Gallium crystals.jpg
Gallium
PronunciationTemplate:Infobox element/pronunciation/format
Appearancesilvery blue
Mass numberTemplate:Infobox element/symbol-to-most-stable-isotope
Gallium in the periodic table
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
Al

Ga

In
zincgalliumgermanium
Atomic number (Z)31
Groupgroup 13 (boron group)
Periodperiod 4
Block  p-block
Electron configuration[Ar] 3d10 4s2 4p1
Electrons per shell2, 8, 18, 3
Physical properties
Phase at STPTemplate:Infobox element/symbol-to-phase
Melting point302.9146 K ​(29.7646 °C, ​85.5763 °F)
Boiling point2676 K ​(2403 °C, ​4357 °F)[1][2]
Density (at 20° C)5.907 g/cm3[3]
when liquid (at m.p.)6.095 g/cm3
Heat of fusion5.59 kJ/mol
[[Enthalpy of vaporization|Heat of Template:Engvar]]256 kJ/mol[1]
Molar heat capacity25.86 J/(mol·K)
[[Vapor pressure|Template:Engvar pressure]]
Atomic properties
Oxidation statesTemplate:Infobox element/symbol-to-oxidation-state
ElectronegativityPauling scale: 1.81
[[Ionization energy|Template:Engvar energies]]
  • 1st: 578.8 kJ/mol
  • 2nd: 1979.3 kJ/mol
  • 3rd: 2963 kJ/mol
  • (more)
Atomic radiusempirical: 135 pm
Covalent radius122±3 pm
Van der Waals radius187 pm
Template:Infobox element/spectral lines
Other properties
Natural occurrenceTemplate:Infobox element/symbol-to-occurrence
Crystal structureTemplate:Infobox element/crystal structure (oS8)
Lattice constantsa = 452.05 pm
b = 766.25 pm
c = 452.66 pm (at 20 °C)[3]
Thermal expansion20.5×10−6/K (at 20 °C)[3][lower-alpha 1]
Thermal conductivity40.6 W/(m⋅K)
Electrical resistivity270 nΩ⋅m (at 20 °C)
Magnetic orderingdiamagnetic
Molar magnetic susceptibility−21.6×10−6 cm3/mol (at 290 K)[4]
Young's modulus9.8 GPa
Speed of sound thin rod2740 m/s (at 20 °C)
Poisson ratio0.47
Mohs hardness1.5
Brinell hardness56.8–68.7 MPa
CAS Number7440-55-3
History
Namingafter Lua error in Module:Unicode_data at line 15: attempt to call field 'length' (a nil value). (Latin for: France), homeland of the discoverer
PredictionDmitri Mendeleev (1871)
Discovery and first isolationLecoq de Boisbaudran (1875)
SymbolTemplate:Infobox element/symbol-to-symbol-etymology
Isotopes of gallium
Template:infobox gallium isotopes does not exist
 Category: Gallium
| references
child table, as reused in {IB-Ga}
Main isotopes of gallium
Template:Infobox gallium isotopes

Notes

  1. The thermal expansion is anisotropic: the parameters (in the range 280–302.9 K) are αa = 31.9×10−6/K, αb = 16.2×10−6/K, αc = 13.3×10−6/K, and αaverage = 20.5×10−6/K.[3]

References

  1. 1.0 1.1 Zhang Y; Evans JRG; Zhang S (2011). "Corrected Values for Boiling Points and Enthalpies of Vaporization of Elements in Handbooks". J. Chem. Eng. Data. 56 (2): 328–337. doi:10.1021/je1011086.
  2. "Gallium (CAS Number 7440-55-3) : Strem Product Catalog". Strem Chemicals Inc. Retrieved 4 December 2023.
  3. 3.0 3.1 3.2 3.3 Arblaster, John W. (2018). Selected Values of the Crystallographic Properties of Elements. Materials Park, Ohio: ASM International. ISBN 978-1-62708-155-9.
  4. Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.