Arrangements or Distribution of electron

The arrangement or Distribution of electron in the atom

  • The distribution or arrangements of electron in different shell of the atom is called electronic configuration Of the elements.
  • The arrangements of electron in different shell should be such that it should have Maximum stability. Thus to write electronic configuration of an element, we should know
  • Total number of electron presents in the atom . This is equal to the number of protons ( that is atomic number)  for  a neutral atom.
  • Maximum number of electron that can present in each shell of atom .  This is given by Bohr-Bury scheme.

2n2    n= designation.  K shell (n=1) , L shell (n=2) , M shell (n=3) , N shell (n=4) ,

Shell

N     2n2 Maximum number of electron
K       1 2(1) 2

      2

L

      2 2(2) 2       8
M       3 2(3) 2

     18

N

      4 2(4) 2

      32


Formula:

The maximum number of electron in any one shell= 2n2

Here n = shell number

K shell:

Maximum number of electron

2(1) 2

= 2×1

= 2 Maximum   2 electron present in K shell

  • L shell:

Maximum number of electron

2(2) 2

= 2×4

= 8 Maximum 8 electron present in L Shell

  • M shell:

Maximum number of electron

2(3) 2

= 2×9

= 18 Maximum 18 electron present in M shell

  • N shell:

Maximum number of electron

2(4) 2

= 2×16

=32

Maximum 32 electron present in N shell

  • The third M shell can be hold 8, or 18 electrons but the total capacity of third shell is 18.
  • The outer most of the orbit or shell of elements electron called valence electrons. Or valence shell.
  • For example : Ca   (calcium )

Electronic configuration of Ca = 2, 8, 8, 2

K shell= 2 electron

L shell= 8 electron

M shell=8 electron

N shell= 2 electron

  • For example : C  (Carbon )

Electronic configuration of C = 2, 4

K shell= 2 electron

L shell= 4 electron

 

For example :    N (Nitrogen )

Electronic configuration of N = 2, 5

K shell= 2 electron

L shell= 5 electron

Question Answer

1) What is electronic configuration?

Answer: The distribution or arrangements of electron in different shell of the atom is called electronic configuration Of the elements.

2) What are the rule given by Bohr- Bury Scheme?

Answer: • The arrangements of electron in different shell should be such that it should have Maximum stability. Thus to write electronic configuration of an element, we should know  following.

  • Total number of electron presents in the atom . This is equal to the number of protons ( that is atomic number)  for  a neutral atom.
  • Maximum number of electron that can present in each shell of atom . This is given by Bohr-Bury scheme .

3) How are the divination of shell by 2n2    formula?

Answer: 2n2    n= designation.  K shell (n=1) , L shell (n=2) , M shell (n=3) , N shell (n=4) ,

K shell:  2(1) 2 = 2

L shell:  2(2) 2 = 2×4= 8

M shell:  2(3) 2 = 2×9= 18

N shell:   2(4) 2 = 2×16=32

 

 

4) Give the example of Ca electron distribution?

  • Answer: Ca   (calcium )

Electronic configuration of Ca = 2, 8, 8, 2

K shell= 2 electron

L shell= 8 electron

M shell=8 electron

N shell= 2 electron

5) Give the example of Nitrogen ,How electron will be arrange in shell?

Answer: example : N  (Nitrogen)

Electronic configuration of N = 2, 5

K shell= 2 electron

L shell= 5 electron

Leave a Reply

Your email address will not be published. Required fields are marked *

four + sixteen =