Molybdenum :
Molybdenum us transition metal. It is shiny and show lustrous properties.
It is toxic in nature. It is found in earth crust in the form of minerals. The minerals molybdenum disulphide and molybenite give molybdenum metal. It is rare element present in trace amount on the earth surface. Molybdenum is use for plant and animals .
It is highest melting point element. It is refractive metal ( resistance to heat and wear)
Discovery : molybdenum is discovered in 1781 by scientist Peter Jacob Hjelum
Origin of name :.The name is originated from Greek word ‘ Molybdos ‘
Meaning of this word is lead
Physical properties :
Atomic symbol: atomic symbol of molybdenum is Mo
Atomic number : atomic number of molybdenum is 42
In molybdenum 42 proton and 42 electron is present
Atomic weight/ mass: molybdenum show atomic weight is 95.9 Amu approximately 96 Amu
In molybdenum 42 proton and 54 neutron is present
Sum of proton and neutron gives atomic mass
Position : molybdenum is placed in periodic table at 5th row ( period) and 6 thcolumn ( group)
Block : it is placed in d block
Colour :molybdenum show silver colour
Nature :. It show solid in nature
Boiling point :boiling point of molybdenum is 46390C
Melting point : melting point of molybdenum is 26220 C
Isotopes:
Molybdenum show 7 stable isotope
92Mo: atomic weight of this isotope is 91.9 Amu
In this isotope 42 proton,42 electron and 50 neutron is present
It is present 14.5 % in nature
94Mo: atomic weight of this isotope is 9 Amu
In this isotope 42 proton, 42 electron and 52 neutron is present
It is present 9.15 % in nature
95 Mo: atomic weight of this isotope is 94.9 Amu
In this isotope 42 proton, 42 electron and 53 neutron is present
It is present 15.8 % in nature
96Mo: atomic weight of this isotope is 95.9 Amu
In this isotope 42 proton, 42 electron and 54 neutron is present
It is present 16.6 % in nature
97Mo: atomic weight of this isotope is 96.9 Amu
In this isotope 42 proton, 42 electron and 55 neutron is present
It is present 9.6% in nature
98Mo : atomic weight of this isotope is 97.9 % in nature.
In this isotope 42 proton, 42 electron and 56 neutron is present
It is present 24.3% in nature
100Mo : atomic weight of this isotope is 99.9 Amu
In this isotope 42 proton, 42 electron and 58 neutron is present.
It is present 9.8 % in nature.
Chemical properties :
Electronic configuration
Electronic configuration of molybdenum is [ kr] 4d5 5S1
Electronic configuration in concert of shell is 2,8,18, 13,1
Electronic structure
Valency :molybdenum show valency2,3,4,5,6 in different compound .
Atomic radius : atomic radius of molybdenum is 190 Pm
Reactivity : Molybdenum is slightly reactive element .
It is not react with Oxygen and water
Uses:
Molybdenum is use as enzyme in animal metabolism.
Molybdenum is use as catalyst in petroleum industry for coal
It’s have high melting point hence it is use as glass furnace electrode
It is use in steel for hardening
Molybdenum is also use in electrical device
It’s powder form used in fertilizer
Molybdenum contain glass use for CIGS solar cell fabrication
Question and Answer:
Q1. Define Molybdenum
Q2. Who discovered Molybdenum?
Q2. Physical properties of Molybdenum
Q4. Write Atomic Symbol of Molybdenum.
Q5. Write the Atomic number of Molybdenum.
Q6. On which block Molybdenum element is present?
Q7. What is the color of Molybdenum?
Q8. What is the Boiling point of Molybdenum?
Q9. What is the Melting point of Molybdenum?
Q10. Write the Isotopes of Molybdenum.
Q11. Show Electronic configuration of Molybdenum.
Q12. Write Electronic Structure of Molybdenum.
Q13. What is the Valency of Molybdenum?
Q14. Write the uses of Molybdenum element.