Define: Tungsten is transition metal and place in between molybdenum and seaborgium element. It is rarely found element. It is the heaviest metal . It is found in earth crust in the firm of scheelite and wolframiteore. It is also form by reduction of tungsten oxide with hydrogen and carbon It is very durable and string metal . It have highest melting point and lowest vapour pressure
Discovery :. Tungsten is discovered in 1783 by scientist Juan and FaustoElhuyar
Origin of name :. The name is derived from Swedish word ‘tungsten‘
Meaning of this word is heavy stone
Physical properties :
Atomic symbol: it is denoted by symbol W
Atomic number : atomic number of Tungsten is 74
In tungsten 74 proton and 74 electron is present
Atomic weight/ mass: Atomic weight of Tungsten is 183.8 Amu
In tungsten 74 proton And 110 neutron is present.
Position : Tungsten is place in periodic table at 6thperiod ( row ) and 6th column ( group )
Block : it is place in d block
Colour : tungsten show silvery white colour
Nature : tungsten present in solid form
Boiling point : Boiling point of tungsten is 5555 0C
Melting point : Melting point of Tungsten is 3414 0C
Tungsten show 5 stable isotope
180W: atomic weight of this isotope is 179.9 Amu
In this isotope 74 proton,74 electron and 106 neutron is present
It is present 0.12 % in nature
182W: atomic weight of this isotope is 181.9 Amu
In this isotope 74 proton, 74 electron and 108 neutron is present
It is present 26.5 % in nature
183W: atomic weight of this isotope is 182.9 Amu
In this isotope 74 proton, 74 electron and 109 neutron is present
It is present 14.3% in nature
184W: Atomic weight of this isotope is 183.9 Amu
In this isotope 74 proton, 74 electron and 110 neutron is present
It is present 30.6% in nature
186W: atomic weight of this isotope is 185.9 Amu
In this isotope 74 proton, 74 electron and 112 neutron is present
It is present 28.4 % in nature
Chemical properties :
Electronic configuration : Electronic configuration of tungsten is [ Xe] 4f14 5d4 6S2
Electronic configuration in concert of shell is 2,8,18,32,12,2
Valency : valency of tungsten is 2 or 3 or 4
Atomic radius : Atomic radius of tungsten is 193 Pm
- Tungsten use to make fluorescent lightings with calcium and magnesium
- It is use for making arc welding electrodes and heating element
- It’s carbide form use in mining and petroleum industry
- It is use in light bulb as filaments
- It is also use in cathode Ray tube
- Tungsten use as super alloy for coating to the resistance
- It is use to make rings
- When it is bonded with Carbon and carbide tungsten it is use in drill bits and other things
Question and Answer:
Q1. Define Tungsten
Q2. Who discovered Tungsten?
Q2. Physical properties of Tungsten
Q4. Write Atomic Symbol of Tungsten.
Q5. Write the Atomic number of Tungsten.
Q6. On which block Tungsten element is present?
Q7. What is the color of Tungsten?
Q8. What is the Boiling point of Tungsten?
Q9. What is the Melting point of Tungsten?
Q10. Write the Isotopes of Tungsten.
Q11. Show Electronic configuration of Tungsten.
Q12. Write Electronic Structure of Tungsten.
Q13. What is the Valency of Tungsten?
Q14. Write the uses of Tungsten element.
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