Neptunium ( Np ):
Define: Neptunium is inner transition metal place at 4th number in actinides series. It is radioactive element and 1st transuranic element ( the element which have atomic number greater than 92 means atomic number greater than uranium is called transuranic element) . It is ductile in nature. And toxic .it is man made element . It is found as by product in nuclear reactor in small amount from uranium ores
Discovery :. It is discovered in 1940 by scientist Edwin McMillan and philp
Origin of name : the name gives after the planet Neptune.
Physical properties :
Atomic symbol: Atomic symbol of neptunium is Np
Atomic number : Atomic number of Neptunium is 93
In neptunium 93 proton and 93 electron is present
Atomic weight/ mass: atomic mass of 237 .05 Amu
In neptunium 93 proton and 144 neutron is present
Position : it is place in periodic table at 7th period and actinides group
Block : it is place in f block
Colour : neptunium show silvery colour
State : neptunium show solid form in nature
Boiling point :Boiling point of Neptunium is 3902 0C
Melting point :melting point of Neptunium is 644 0C
- 236Np: atomic weight of this isotope is 236.04 Amu
In this isotope 93 proton ,93 electron and 143 neutron is present
- 237Np: atomic weight of this isotope is 237.04 Amu
In this isotope 93 proton, 93 electron and 144 neutron is present
Chemical properties :
Electronic configuration of Neptunium is [ Rn ] 5f4 6d1 7s2
Electronic configuration of Neptunium is 2,8,18,32,22,9,2
Valency : Valency of Neptunium is 3,4,or 5
Atomic radius : Atomic radius of Neptunium is 175 Pm
- Neptunium 237 isotope use in neutron detector
- It is use in making plutonium – 230 isotopes
- It is use to make atomic bomb
- It is generally use in research field
Question and Answer:
Q1. Define Neptunium
Q2. Who discovered Neptunium?
Q2. Physical properties of Neptunium
Q4. Write Atomic Symbol of Neptunium.
Q5. Write the Atomic number of Neptunium.
Q6. On which block Neptunium element is present?
Q7. What is the color of Neptunium?
Q8. What is the Boiling point of Neptunium?
Q9. What is the Melting point of Neptunium?
Q10. Write the Isotopes of Neptunium.
Q11. Show Electronic configuration of Neptunium.
Q12. Write Electronic Structure of Neptunium.
Q13. What is the Valency of Neptunium?
Q14. Write the uses of Neptunium element.