Tungsten Atomic Mass



Element Tungsten - W

Comprehensive data on the chemical element Tungsten is provided on this page; including scores of properties, element names in many languages, most known nuclides of Tungsten. 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.

Sep 08, 2012 The average atomic mass is calculated by multiplying the mass of each isotope by its abundance and then adding them all up. NOTE: The abundances are given in percent. To get the decimal equivalent of percent, move the decimal point two places to the left. 26.50% = 0.2650 in decimals. W-180: 179.946706 x 0.0012 = 0.22. Atomic mass of tungsten = total number of protons and neutrons in a nucleus of tungsten. Therefore the neutrons of tungsten = Atomic mass of tungsten- protons of tungsten Atomic mass of tungsten = 183.84 Tungsten protons = 74.

Tungsten Menu

  • Tungsten Page One
  • Tungsten Page Two
  • Tungsten Page Three

Overview of Tungsten

  • Atomic Number: 74
  • Group: 6
  • Period: 6
  • Series: Transition Metals

Tungsten's Name in Other Languages

Tungsten Element Atomic Model

  • Latin: Wolframium
  • Czech: Wolfram
  • Croatian: Volfram
  • French: Tungsténe
  • German: Wolfram - r
  • Italian: Wolframio
  • Norwegian: Wolfram
  • Portuguese: Tungstênio
  • Russian: Вольфрам
  • Spanish: Wolframio
  • Swedish: Volfram

Atomic Structure of Tungsten

  • Atomic Radius: 2.02Å
  • Atomic Volume: 9.53cm3/mol
  • Covalent Radius: 1.3Å
  • Cross Section (Thermal Neutron Capture) σa/barns: 18.3
  • Crystal Structure: Cubic body centered
  • Electron Configuration:
    1s2 2s2p6 3s2p6d10 4s2p6d10f14 5s2p6d4 6s2
  • Electrons per Energy Level: 2,8,18,32,12,2
    Shell Model
  • Ionic Radius: 0.62Å
  • Filling Orbital: 5d4
  • Number of Electrons (with no charge): 74
  • Number of Neutrons (most common/stable nuclide): 110
  • Number of Protons: 74
  • Oxidation States:6,5,4,3,2
  • Valence Electrons: 5d4 6s2
    Electron Dot Model

Chemical Properties of Tungsten

  • Electrochemical Equivalent: 1.1432g/amp-hr
  • Electron Work Function: 4.55eV
  • Electronegativity: 2.36 (Pauling); 1.4 (Allrod Rochow)
  • Heat of Fusion: 35.4kJ/mol
  • Incompatibilities:
    Bromine trifluoride, chlorine trifluoride, fluorine, iodine pentafluoride
  • Ionization Potential
    • First: 7.98
  • Valence Electron Potential (-eV): 140

Physical Properties of Tungsten

  • Atomic Mass Average: 183.85
  • Boiling Point: 5928K 5655°C 10211°F
  • Coefficient of lineal thermal expansion/K-1: 4.59E-6
  • Conductivity
    Electrical: 0.189 106/cm Ω
    Thermal: 1.74 W/cmK
  • Density: 19.35g/cc @ 300K
  • Description:
    Hard, silver-white metal that is generally obtained as a dull grey powder that is hard to melt.
  • Elastic Modulus:
    • Bulk: 311/GPa
    • Rigidity: 160.5/GPa
    • Youngs: 411/GPa
  • Enthalpy of Atomization: 837 kJ/mole @ 25°C
  • Enthalpy of Fusion: 35.23 kJ/mole
  • Enthalpy of Vaporization: 799.1 kJ/mole
  • Flammablity Class: Combustible
  • Freezing Point:see melting point
  • Hardness Scale
    • Brinell: 2570 MN m-2
    • Mohs: 7.5
    • Vickers: 3430 MN m-2
  • Heat of Vaporization: 824kJ/mol
  • Melting Point: 3680K 3407°C 6165°F
  • Molar Volume: 9.5 cm3/mole
  • Optical Reflectivity: 62%
  • Physical State (at 20°C & 1atm): Solid
  • Specific Heat: 0.13J/gK
  • Vapor Pressure = 4.27Pa@3407°C

Regulatory / Health

  • CAS Number
    • 7440-33-7
  • RTECS: Y07175000
  • OSHAPermissible Exposure Limit (PEL)
    • No limits set by OSHA
  • OSHA PEL Vacated 1989
    • TWA: 5 mg/m3
    • STEL: 10 mg/m3
  • NIOSHRecommended Exposure Limit (REL)
    • TWA: 5 mg/m3
    • STEL: 10 mg/m3
  • Routes of Exposure: Inhalation; Ingestion; Skin and/or eye contact
  • Target Organs: Eyes, skin, respiratory system, blood
  • 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: 0.001
    • Bone/p.p.m: 0.00025
    • Liver/p.p.m: n/a
    • Muscle/p.p.m: n/a
    • Daily Dietary Intake: 0.001-0.015 mg
    • Total Mass In Avg. 70kg human: 0.02 mg

Who / Where / When / How

  • Discoverer: Fausto and Juan José de Elhuijar
  • Discovery Location: Vergara Spain
  • Discovery Year: 1783
  • Name Origin:
    Swedish: tung sten (heavy stone): W symbol from its German name wolfram which is named after wolframite.
  • Abundance of Tungsten:
    • Earth's Crust/p.p.m.: 160.6
    • Seawater/p.p.m.: 0.000092
    • Atmosphere/p.p.m.: 411
    • Sun (Relative to H=1E12): 0.28
  • Sources of Tungsten:
    Occurs in the minerals scheelite (CaWO4) and wolframite [(Fe,Mn)WO4]. Annual world wide production is around 45,100 tons. Primary mining areas are China, Malaysia, Burma, bolivia, canada, Australia, Japan and USA.
  • Uses of Tungsten:
    Used widely in the electronics industry. Made into filaments for vacuum tubes and electric lights. Also used in contact points in cars, welding electrodes, rocket nozzles and cutting tools. Combined with calcium or magnesium it makes phosphors.
  • Additional Notes:
    Some sources give the German chemist Karl Wilhelm Scheele as the first to isolate the metal in 1880, but most sources credit the Elhuijar brothers.

Tungsten Menu

  • Tungsten Page One
  • Tungsten Page Two
  • Tungsten Page Three

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.

Tungsten Atomic MassTungsten Atomic Mass

Related Resources

  • Anatomy of the Atom
    Answers many questions regarding the structure of atoms.
  • Molarity, Molality and Normality
    Introduces stoichiometry and explains the differences between molarity, molality and normality.
  • Molar Mass Calculations and Javascript Calculator
    Molar mass calculations are explained and there is a JavaScript calculator to aid calculations.
  • Chemical Database
    This database focuses on the most common chemical compounds used in the home and industry.

Citing this page

Tungsten Atomic Mass

If you need to cite this page, you can copy this text:

Kenneth Barbalace. Periodic Table of Elements - Tungsten - W. EnvironmentalChemistry.com. 1995 - 2021. Accessed on-line: 4/25/2021
https://EnvironmentalChemistry.com/yogi/periodic/W.html
.

Linking to this page

Tungsten Atomic Mass Grams Per Mole

If you would like to link to this page from your website, blog, etc., copy and paste this link code (in red) and modify it to suit your needs:

<a href='https://EnvironmentalChemistry.com/yogi/periodic/W.html'>echo Periodic Table of Elements: Tungsten - W (EnvironmentalChemistry.com)</a>- Comprehensive information for the element Tungsten - W is provided by this page including scores of properties, element names in many languages, most known nuclides and technical terms are linked to their definitions.
.

NOTICE: While linking to articles is encouraged, OUR ARTICLES MAY NOT BE COPIED TO OR REPUBLISHED ON ANOTHER WEBSITE UNDER ANY CIRCUMSTANCES.

PLEASE, if you like an article we published simply link to it on our website do not republish it.