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6. Summarise the rules for writing of distribution of electrons in various shells for the first eighteen elements.

6. Summarise the rules for writing of distribution of electrons in various shells for the first eighteen elements.

Grade:12th pass

1 Answers

Pawan Prajapati
askIITians Faculty 8740 Points
8 months ago
1. The maximum number of electrons that can be accommodated in a shell is given by the formula : 2n2, where n = 1, 2, 3... 2. Maximum number of electrons in different shells are : K shell – n = 1; 2n2 = 2(1)2 = 2 L shell – n = 2; 2n2 = 2(2)2 = 8 M shell – n = 3; 2n2 = 2(3)2 = 18 N shell – n = 4; 2n2 = 2(4)2 = 32 3. Given number of electrons is 18. 4. The electrons are not taken unless the inner shells are filled. 5. Hence, the highest element has K – 2; L – 8; M – 8.

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