Praseodymium( Pr) :
Define: Praseodymium is inner transition metal which is place in 2nd number at lanthanide series . It is rare earth metal. It is stable metal .it show malleable, ductile properties. Praseodymium show similar chemical properties like Gadolinium element.
Praseodymium is found in earth curst in the form of monazite and bastnaesiteminerals. It is made by process of reduction of anhydrous chloride with calcium .
Discovery : Praseodymium is discovered in 1885 by scientist Carl Auer Von Welsbach
Origin of name :. The name is derived from Greek word ‘ prasiosdidymos’ . Meaning of prasiosis green and didymos’ meaning is twin .
Physical properties :
Atomic symbol: Praseodymium is denoted by symbol ‘ Pr
Atomic number : atomic number of praseodymium is 59
In praseodymium 59 proton and 59 Electron is present
Atomic weight/ mass: Atomic weight of praseodymium is 140.9 Amu
In praseodymium 59 proton and 82 neutron is present
Position : praseodymium is place in periodic table at 3rd column ( group ) and 6th period ( row )
Block : praseodymium is place in f block
Outer shell electron present in f orbit
Colour : praseodymium show yellowish colour
Nature : praseodymium present in nature at solid form
Boiling point : boiling point of praseodymium is 3520 0C
Melting point :Melting point of praseodymium is 931 0C
Isotopes:
Praseodymium show only 1 stable isotope
141Pr : Atomic weight of this isotope is 140.9 Amu
In this isotope 59 proton,59 electron and 82 neutron is present
It is present 100% in nature
Praseodymium also show Radio active isotope
Chemical properties :
Electronic configuration:
Electronic configuration of praseodymium is [ Xe ] 4f3 6S2
Electronic configuration in concert of shell is 2,8,18,21,8,2
Electronic structure
Valency :valency of praseodymium is 3
Atomic radius : Atomic radius of praseodymium is 247 pm
Uses:
It’s salt form is use make colour glass , enamel and glazes
Praseodymium is use for making glasses for welding purpose
Any Lanthanide metal along with praseodymium use to make carbon arc electrode
It’s alloy form is use for making permanent magnet
Praseodymium is use in projection of lighting in the major motion picture industry
Praseodymium is also use to make porcelain
It is also use in air craft
It is mainly use to make hybrid cars
Praseodymium with nickel metal hybrid is use to make rechargeable batteries for hybrid auto Mobile
Question and Answer:
Q1. Define Praseodymium
Q2. Who discovered Praseodymium?
Q2. Physical properties of Praseodymium
Q4. Write Atomic Symbol of Praseodymium.
Q5. Write the Atomic number of Praseodymium.
Q6. On which block Praseodymium element is present?
Q7. What is the color of Praseodymium?
Q8. What is the Boiling point of Praseodymium?
Q9. What is the Melting point of Praseodymium?
Q10. Write the Isotopes of Praseodymium.
Q11. Show Electronic configuration of Praseodymium.
Q12. Write Electronic Structure of Praseodymium.
Q13. What is the Valency of Praseodymium?
Q14. Write the uses of Praseodymium element.
