What is Tungsten

Tungsten (pronunciation TUNG-sten <2>), represented by the chemistry symbol or formula W <1>, is a hard, brittle element belonging to the family members of transition metals <3>. Naturally arising W is a mixture the 5 isotopes v mass numbers 180, 182, 183, 184 and 186 <1, 3>. Besides that, it has 33 synthetic, radioactive isotopes with well-known half-lives <3>. It no react v water and also oxygen (air) in ~ room temperature. In red hot condition, it develops its oxide. The reacts through halogens but remains unaffected by most acids and bases <9>.

You are watching: Number of valence electrons in tungsten


*

Tungsten Symbol


Where Is the Found

The steel does no occur openly in nature. Its major ores room wolframite and also scheelite. Commercially, the is developed by reduce tungsten oxide through carbon or hydrogen <1>. That is mined in China (world’s leading producer), Austria, Portugal and also Bolivia <21>.

History

Origin that Its Name: Its surname is derived from the sweden words “tung sten” meaning heavy rock <1>. The beginning of its chemistry symbol is its previously German name, Wolfram that is obtained from the mineral wolframite from which the was first extracted <2>.


Who discovered Tungsten: Spanish chemist brothers, Juan and also Fausto Elhuyar<1, 2>.

When was It Discovered: Its exploration year is 1783 <1>.

How to be It Discovered

In 1779, irish chemist Peter Woulfe investigated a mineral indigenous Sweden and also concluded that it had a brand-new metal yet did no isolate it. In 1781, German-Swedish chemist Wilhelm Scheele examined it and also separated one acidic white oxide from the which he it was observed to it is in an oxide that a brand-new metal. Finally, in 1783 the Elhuyar brother successfully reduced the oxidze come metallic tungsten by heating it v carbon in ~ the Seminary at Vergara, in Spain <1, 3>.


*

Tungsten


Tungsten Identification

Atomic Number74 <1>
CAS Number7440-33-7 <1>
Position in the regular tableGroupPeriodBlock
6 <1>6 <1>d <1>

*

Where is Tungsten discovered on the regular Table


Properties and Characteristics that Tungsten

General Properties

Atomic mass183.84 atomic mass devices <1>
Atomic weight183.84 <1>
Mass number184 <3>
Molar mass/molecular weight183.84 g/mol <14>

Physical Properties

Color/appearanceSilvery-white <3>
LusterMetallic <3>
Melting point/freezing point3414°C, 6177°F <1>
Boiling point5555°C, 10031°F <1>
Density 19.3 g cm-3 <1>
State of matter at room temperature (normal phase)Solid <1>
Thermal Conductivity164 W/(m K) <17>
Electrical Conductivity18X106<1/ohm-m)> <17>
Specific warm capacity0.134 J/g K <16>
Specific gravity19.25 <18>
Resistivity5.60X10-8 ohm-m <13>
Hardness (Mohs scale)7.5 <27>
DuctilityLimited/nil <19>
MalleabilityYes <22>
Yield strength550 MPa <24>
Tensile strength100,000 – 500,000 psi <25>
Temperature coefficient0.0045 <26>

Chemical Properties

Oxidation states/ionic charge6, 5, 4, 3,2, 0 <1>
FlammabilityYes (W powder) <20>

Magnetic Properties

Magnetic orderingParamagnetic <11>

Atomic Data that Tungsten (Element 74)


Valence electrons6 <4>
Valency+2, +3, +4, +5, +6 <7>
Quantum numbers
– n5 <5>
– ℓ2 <5>
– m ℓ1 <5>
– m s+½ <5>
Electron construction (noble gas configuration) 4f145d46s2 <1>
Crystal structureBody-centered cubic <8>
Lattice constant316.52, 316.52, 316.52 afternoon <28>
Atomic structure
– number of Electrons74 <3>
– variety of Neutrons110 <3>
– variety of Protons74 <3>
Energy level <3>
– an initial Energy Level2
– 2nd Energy Level8
– 3rd Energy Level18
– Fourth energy Level32
– Fifth power Level12
– Sixth power Level2
Radius of atom
– atom Radius2.18 Å <1>
– Covalent Radius1.50 Å <1>
Electronegativity (Pauling scale)1.7 <1>
Ionization energy

(kJmol-1) <1>

1st2nd3rd4th5th6th7th8th
758.7641553.4

*
Tungsten Electron construction (Bohr Model)


Tungsten Uses

As filaments in old layout of incandescent electrical bulbs. They room not much used this days as they room not energy efficient <1>.It is alloyed through other metals or steel for increase them. The metal and also its alloys have numerous high-temperature applications such as heating facets in high-temperature furnaces, arc-welding electrodes, etc <1>.Tungsten carbide being massively hard is important to the mining, metal-working and petroleum industries. It also makes great drilling and also cutting devices <1>.Making jewelry and also fishing tools <12, 29>.
*

What does Tungsten look at Like


Is it Dangerous

Though the element is taken into consideration to it is in of short toxicity to humans, inhaling hazardous W dust may result in chronic poisoning the may an outcome in pulmonary fibrosis <3, 10>. Exposure may additionally pose a hazard of allergy <20>.

See more: How Heavy Is A Cord Of Wood Weigh【 2021 】, How Much Does A Cord Of Wood Weigh【 2021 】


Interesting Facts

Tungsten is the steel which has the greatest melting suggest <1>.It is the strongest steel for its highest tensile toughness <23>.It does no rust, tarnish and also is scrape resistant <15>!

Tungsten (W Element) Cost

The pure steel is priced in ~ $11 because that every 100 gram and in bulk, the same quantity expenses $2.95 <3>.