Protactinium ( Pa ) :
Define: Protactinium is inner transition metal. it is place at 2nd number in actinides series. It is dense and highly toxic metal . It is found in uranium ores it is also collected by extraction from Nuclear reactor.
Discovery : Protactinium is discovered in 1931 by scientist Kasimir and Otto Gohring .
Origin of name :the name is derived from Greek word ‘protos’ Meaning of this word is first .
Physical properties :
Atomic symbol: Atomic symbol of protactinium is Pa
Atomic number : Atomic number of Protactinium is 91
In protactinium 91 proton and 91 Electron is present
Atomic weight/ mass: Atomic weight of protactinium is 231.04 Amu
Position : it is place in periodic table at 7th period and actinides group
Block : it is place in f block
Colour : protactinium show silvery grey colour
State : protactinium present in solid form
Boiling point :Boiling point of protactinium is 4000 0C
Melting point : melting point of protactinium is 1572 0C
Isotopes:
- 231Pa: atomic weight of this isotope is 231.03 Amu
In this isotope 91 proton ,91 electron and 140 neutron is present
Chemical properties :
Electronic configuration
Electronic configuration of Protactinium is [ Rn ] 5f2 6d1 7s2
Electronic configuration in concert of shell is 2,8,18,32,20,9,2
Electronic structure
Valency :valency of protactinium is 2,3 or 5
Atomic radius : Atomic radius of protactinium is 180 Pm
Uses:
- Protactinium is used only in research field
Question and Answer:
Q1. Define Protactinium
Q2. Who discovered Protactinium?
Q2. Physical properties of Protactinium
Q4. Write Atomic Symbol of Protactinium.
Q5. Write the Atomic number of Protactinium.
Q6. On which block Protactinium element is present?
Q7. What is the color of Protactinium?
Q8. What is the Boiling point of Protactinium?
Q9. What is the Melting point of Protactinium?
Q10. Write the Isotopes of Protactinium.
Q11. Show Electronic configuration of Protactinium.
Q12. Write Electronic Structure of Protactinium.
Q13. What is the Valency of Protactinium?
Q14. Write the uses of Protactinium element.