Page 4 - classification of elements

Electronic Configuration: The systemic distribution of electrons

around the nucleus in different shells and sub-shell of an atom is

electronic configuration. The orbits around the nucleus are named as

and Q where k is the innermost and other are

respectively outward.

2
Rule of 2n : It is the rule that determines the maximum numbers of

electrons that can accommodated in a particular shell. According to

this rule,

S.N SHELL 2n 2 Maximum electrons accommodated

2
1. K, n=1 =2*1 =2 2
2
2. L, n=2 =2*2 =8 8
2
3. M, n=3 =2*3 =18 18
2
4. N, n=4 =2*4 =32 32

2
5. O, n=5 =2*5 =50 50
2
6. P, n=6 =2*6 =72 72
2
7. Q, n=7 =2*7 =98 98