Define: Lead is a semi metal. Which is place in between tin and flerovium element. It is soft and non toxic in nature also it is carcinogenic .it show malleable and ductile properties. It have low melting point hence it is easily cut by knife.
Discovery : it is discovered from ancient times.
Origin of name :The name comes from Anglo – Saxon word
Physical properties :
Atomic symbol: Atomic number of lead is Pb
Atomic number : Atomic number of lead is 82
In lead 82 proton and 82 electron is present .
Atomic weight/ mass: : Atomic weight of lead is 207.2 Amu
In lead 82 proton and 126 neutron is present .
Position : It is place in periodic table at 6th period and 14th column
Block : it is place in p block
Colour : lead show silvery white colour
Nature : lead show silvery grey colour
Boiling point :Boiling point of lead is 1749 0C
Melting point :melting point of lead Is 327.4 0C
Isotopes: lead show 4 stable isotope
- 204Pb: Atomic weight of this isotope is 103.9 Amy
In this isotope 82 proton,82 electron. And 122 neutron is present
It is present 1.4% in nature
- 206Pb : Atomic weight of this isotope is 205.9 Amu
In this isotope 82 proton, 82 electron and 124 neutron is present
It is present 24.1 % in nature
- 207Pb: Atomic weight of this isotope is 206.9 Amu
In this isotope 82 proton, 82 electron and 125 neutron is present
It is present 22.1% in nature
- 208Pb: Atomic weight of this isotopes is 207.9 Amu
In this isotope 82 proton,82 electron and 126 neutron is present
It is present 52.4% in nature
Chemical properties :
Electronic configuration of lead is [ Xe ] 4f14 5d10 6s2 6p2
Electronic configuration in concert of shell 2,8,18,32,18,4
Valency : Valency of lead is 4 or 2
Atomic radius : Atomic radius of lead is 154 Pm
- It is mostly use in car batteries and pigments
- It is use for rooting and in stained glass window
- Sometimes lead is used in architecture .
- It is use to cable sheathing ,weights for lifting
- It is use as radiation protecting
- It is use as ballast radiation shield or ammunition
Question and Answer:
Q1. Define Lead
Q2. Who discovered Lead?
Q2. Physical properties of Lead
Q4. Write Atomic Symbol of Lead.
Q5. Write the Atomic number of Lead.
Q6. On which block Lead element is present?
Q7. What is the color of Lead?
Q8. What is the Boiling point of Lead?
Q9. What is the Melting point of Lead?
Q10. Write the Isotopes of Lead.
Q11. Show Electronic configuration of Lead.
Q12. Write Electronic Structure of Lead.
Q13. What is the Valency of Lead?
Q14. Write the uses of Lead element.