Ge Atomic Number



In the cosmos the atomic abundance of germanium is 50.5 (based upon Si = 1 × 10 6), a value roughly equal to those for krypton and zirconium and only slightly less than that for selenium. The cosmic abundance is much less than those of a number of the heavier elements; e.g., bromine, strontium, tin, barium, mercury, and lead.

  • Atomic Number: 32; Symbol: Ge; Atomic Weight: 72.61; Discovery: Clemens Winkler 1886 (Germany) Electron Configuration: Ar 4s 2 3d 10 4p 2; Word Origin: Latin Germania: Germany; Properties: Germanium has a melting point of 937.4 C, boiling point of 2830 C, specific gravity of 5.323 (25 C), with valences of 2 and 4. In pure form, the element is.
  • Germanium atoms have 32 electrons and the shell structure is 2.8.18.4. The ground state electronic configuration of neutral germanium is Ar. 4p2 and the term symbol of germanium is 3P0.
  • Chemical elements listed by atomic mass The elements of the periodic table sorted by atomic mass. Click on any element's name for further information on chemical properties, environmental data or health effects. This list contains the 118 elements of chemistry.

Element Germanium - Ge

Comprehensive data on the chemical element Germanium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Germanium. Common chemical compounds are also provided for many elements. In addition technical terms are linked to their definitions and the menu contains links to related articles that are a great aid in one's studies.

Germanium Menu

  • Germanium Page One
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Overview of Germanium

  • Atomic Number: 32
  • Group: 14
  • Period: 4
  • Series: Metalloids (Metals)

Germanium's Name in Other Languages

  • Latin: Germanium
  • Czech: Germanium
  • Croatian: Germanij
  • French: Germanium
  • German: Germanium - s
  • Italian: Germanio
  • Norwegian: Germanium
  • Portuguese: Germânio
  • Russian: Германий
  • Spanish: Germánio
  • Swedish: Germanium

Atomic Structure of Germanium

  • Atomic Radius: 1.52Å
  • Atomic Volume: 13.6cm3/mol
  • Covalent Radius: 1.22Å
  • Cross Section (Thermal Neutron Capture)σa/barns: 2.2
  • Crystal Structure: Cubic face centered
  • Electron Configuration:
    1s2 2s2p6 3s2p6d10 4s2p2
  • Electrons per Energy Level: 2,8,18,4
    Shell Model
  • Ionic Radius: 0.53Å
  • Filling Orbital: 4p2
  • Number of Electrons (with no charge): 32
  • Number of Neutrons (most common/stable nuclide): 41
  • Number of Protons: 32
  • Oxidation States: 4
  • Valence Electrons: 4s2p2
    Electron Dot Model

Chemical Properties of Germanium

  • Electrochemical Equivalent: 0.6771g/amp-hr
  • Electron Work Function: 5eV
  • Electronegativity: 2.01 (Pauling); 2.02 (Allrod Rochow)
  • Heat of Fusion: 36.94kJ/mol
  • Incompatibilities:
    Acids
  • Ionization Potential
    • First: 7.899
    • Second: 15.934
    • Third: 34.22
  • Valence Electron Potential (-eV): 109

Physical Properties of Germanium

  • Atomic Mass Average: 72.61
  • Boiling Point: 3103K 2830°C 5126°F
  • Coefficient of lineal thermal expansion/K-1: 5.57E-6
  • Conductivity
    Electrical: 1.45E-8 106/cm Ω
    Thermal: 0.599 W/cmk
  • Density: 5.323g/cc @ 300K
  • Description:
    Hard brittle grayish-white metalloid that is stable in air and water. It is unaffected by acids (except HNO3) and alkalis.
  • Elastic Modulus:
    • Rigidity: 29.6/GPa
    • Youngs: 79.9/GPa
  • Enthalpy of Atomization: 376.6 kJ/mole @ 25°C
  • Enthalpy of Fusion: 34.7 kJ/mole
  • Enthalpy of Vaporization: 334.3 kJ/mole
  • Flammablity Class: Combustible Solid, fine dust is easily ignited
  • Freezing Point:see melting point
  • Hardness Scale
    • Mohs: 6
  • Heat of Vaporization: 330.9kJ/mol
  • Melting Point: 1210.55K 937.4°C 1719.3°F
  • Molar Volume: 13.57 cm3/mole
  • Physical State (at 20°C & 1atm): Solid
  • Specific Heat: 0.32J/gK
  • Vapor Pressure = 0.0000746Pa@937.4°C

Regulatory / Health

  • CAS Number
    • 7440-56-4
  • RTECS: 1008063GE
  • OSHAPermissible Exposure Limit (PEL)
    • No limits set by OSHA
  • OSHA PEL Vacated 1989
    • No limits set by OSHA
  • NIOSHRecommended Exposure Limit (REL)
    • No limits set by NIOSH
  • Levels In Humans:
    Note: this data represents naturally occuring levels of elements in the typical human, it DOES NOT represent recommended daily allowances.
    • Blood/mg dm-3: 0.44
    • Bone/p.p.m: n/a
    • Liver/p.p.m: 0.15
    • Muscle/p.p.m: 0.14
    • Daily Dietary Intake: 0.4-1.5 mg
    • Total Mass In Avg. 70kg human: 5 mg

Who / Where / When / How

  • Discoverer: Clemens A Winkler
  • Discovery Location: Freiberg Germany
  • Discovery Year: 1886
  • Name Origin:
    Latin: Germania (Germany).
  • Abundance of Germanium:
    • Earth's Crust/p.p.m.: 1.8
    • Seawater/p.p.m.:
      • Atlantic Suface: 7E-08
      • Atlantic Deep: 1.4E-07
      • Pacific Surface: 3.5E-07
      • Pacific Deep: 0.000006
    • Atmosphere/p.p.m.: N/A
    • Sun (Relative to H=1E12): 3160
  • Sources of Germanium:
    Obtained from refining copper, zinc and lead. Annual world wide production is around 80 tons.
  • Uses of Germanium:
    Widely used in semiconductors, infrared prisms, reflectors in projectors, wide angle lenses and dentistry.
  • Additional Notes:
    In the elemental form it is a lustrous white, brittle metaloid. When crystalized it has a diamond cubic structure. It is a poor conductor and is used in electronics in rectifying devices and transistors. It is also used in dental alloys. There are several compounds which contain germanium. 'Germaine' or germanium hydride is a colorless gas GeH4 prepared by the action of lithium aluminum hydride on germanium halide in an ether solution. Germaine is a hazardous substance UN2192 which is classified as a poisonous gas (2.3). It is also a flammable gas (2.1). Other compounds include: Germanium dichloride Ge Cl2, Germanium dioxide GeO2, Germanium tetrachloride GeCl4 this is very irritating to eyes and membranes.

Ga Atomic Number

Germanium Menu

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References

A list of reference sources used to compile the data provided on our periodic table of elements can be found on the main periodic table page.

Atomic Number For Ge

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Ga atomic number

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Germanium Atomic Structure

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