Lead

Lead

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 6^th period and 14^th 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

Electronic configuration of lead is [ Xe ] 4f¹⁴ 5d¹⁰ 6s² 6p²

Electronic configuration in concert of shell 2,8,18,32,18,4

Electronic structure

 

Valency : Valency of lead is 4 or 2

Atomic radius : Atomic radius of lead is 154 Pm

Uses:

• 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.