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>.
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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>.
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>.
|Atomic Number||74 <1>|
|CAS Number||7440-33-7 <1>|
|Position in the regular table||Group||Period||Block|
|6 <1>||6 <1>||d <1>|
Where is Tungsten discovered on the regular Table
Properties and Characteristics that Tungsten
|Atomic mass||183.84 atomic mass devices <1>|
|Atomic weight||183.84 <1>|
|Mass number||184 <3>|
|Molar mass/molecular weight||183.84 g/mol <14>|
|Melting point/freezing point||3414°C, 6177°F <1>|
|Boiling point||5555°C, 10031°F <1>|
|Density||19.3 g cm-3 <1>|
|State of matter at room temperature (normal phase)||Solid <1>|
|Thermal Conductivity||164 W/(m K) <17>|
|Electrical Conductivity||18X106<1/ohm-m)> <17>|
|Specific warm capacity||0.134 J/g K <16>|
|Specific gravity||19.25 <18>|
|Resistivity||5.60X10-8 ohm-m <13>|
|Hardness (Mohs scale)||7.5 <27>|
|Yield strength||550 MPa <24>|
|Tensile strength||100,000 – 500,000 psi <25>|
|Temperature coefficient||0.0045 <26>|
|Oxidation states/ionic charge||6, 5, 4, 3,2, 0 <1>|
|Flammability||Yes (W powder) <20>|
|Magnetic ordering||Paramagnetic <11>|
Atomic Data that Tungsten (Element 74)
|Valence electrons||6 <4>|
|Valency||+2, +3, +4, +5, +6 <7>|
|– n||5 <5>|
|– ℓ||2 <5>|
|– m ℓ||1 <5>|
|– m s||+½ <5>|
|Electron construction (noble gas configuration)|
|Crystal structure||Body-centered cubic <8>|
|Lattice constant||316.52, 316.52, 316.52 afternoon <28>|
|– number of Electrons||74 <3>|
|– variety of Neutrons||110 <3>|
|– variety of Protons||74 <3>|
|Energy level <3>|
|– an initial Energy Level||2|
|– 2nd Energy Level||8|
|– 3rd Energy Level||18|
|– Fourth energy Level||32|
|– Fifth power Level||12|
|– Sixth power Level||2|
|Radius of atom|
|– atom Radius||2.18 Å <1>|
|– Covalent Radius||1.50 Å <1>|
|Electronegativity (Pauling scale)||1.7 <1>|
|Ionization energy |
Tungsten UsesAs 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>.
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Interesting FactsTungsten 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>.