According to the rule of 2n^2(2n square) no. of atoms in 3rd shell is equal to 2*9=18 , then why there are only 8 atoms after 2nd shell?

Asked by  | 3rd Dec, 2012, 12:25: AM

Expert Answer:

The rule holds true. In 3rd shell we have 3s, 3p and 3d which can hold 2, 6 and 10 electrons respectively. So, there are total of 18 electrons. 

Answered by  | 3rd Dec, 2012, 09:41: AM

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