Periodic table

 

 

Atomic number:74

Group numbers:6

Period:6

Electronic configuration:[Xe] 4f¹⁴ 5d⁴ 6s²

Formal oxidation number:+6

Electronegativities:1.7

Atomic radius / pm:137

Relative atomic mass:183.84 ± 0.01

 

Tungsten was discovered by Fausto and Juan Jose de Elhuyar (ES) in 1783. Named after the tungsten mineral wolframite. It is a hard, steel-grey to white metal that has the highest melting point of all metals. Tungesten resists oxygen, acids and alkalis. Tungsten occurs in the minerals scheelite (CaWO4) and wolframite [(Fe,Mn)WO4]. It is made into filaments for vacuum tubes and electric lights it can also be used as contact points in cars. Tungsten carbide is extremely hard and is used for making cutting tools and abrasives. Tungsten carbide is also employed for use in many military applications such as creating armor-piercing munitions as well as in the creation of nuclear weaponry. You can even find tungsten carbide around the home with it being common in items such as tungsten rings and other jewelry as well as being found in the tips of ball point pens.

PHYSICAL PROPERTIES

Density / g dm^-3:19300 (293 K)

 17700 (m.p.)

Molar volume / cm³mol^-1:9.53 (293 K)

 10.39 (m.p.)

Electrical resistivity / μΩcm:5.4 (20 °C)

THERMAL PROPERTIES

Thermal conductivity / W m^-1K^-1:174

Melting point / °C:3422

Boiling point / °C:5555

Heat of fusion / kJ mol^-1:35.2

Heat of vaporization / kJ mol^-1:824.2

Heat of atomization / kJ mol^-1:848.1

IONIZATION ENERGIES

First ionization energy / kJ mol^-1:758.77

Second ionization energy / kJ mol^-1:-

Third ionization energy / kJ mol^-1:-

ABUNDANCE OF ELEMENTS

in the atmosphere / ppm:-

in the Earth's crust / ppm:1

in the oceans / ppm:0.000001

CRYSTALLOGRAPHIC DATA

ISOTOPES

REDUCTION POTENTIALS

 

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Citing this page:

Generalic, Eni. "Tungsten." EniG. Periodic Table of the Elements. 3 Jan. 2012. KTF-Split. {Date of access}. <http://www.periodni.com/w.html>.