Question

what is 2n2 rule?write any 3 example​

Answer 1

Answer:

2n^2 depicts the no. of electrons in a shell

Example

for K shell, n = 1, no. of electrons = 2(1)^2 = 2

L shell, n = 2, no. of electrons = 2(2)^2 = 8

M shell, n = 3, no. of electrons = 2(3)^2 = 18

hope this will help you

Answer 2

2n² rule is the rule which is used in the electronic configuration where n is the number of shell.

Explanation:

• 2n² rule is the number of electrons and its arrangement where n is the number of shell.

• It contans one proton in the nucleus of the hydrogen atom it is in k shell.
• The maximum number of electrons present in the shell.
• k shell has 2 electrons
• l shell has 8 electrons.
• m shell has 18 electrons and so on.
• This rule tells us the maximum number of electrons which a shell can accommodate.