Q. 3. The number of electrons contained in each shell is given by the expression,
A. (n)2
B. 2(n)
C. 2(2n2)
D. 2(n)2


Explanation

In the atomic structure, the number of electrons in each shell are vary according to its position from the centrally placed nucleus, like K-shell is the first shell which have only two number of electrons, L-shell is the second shell from the nucleus and have eight number of electrons, M-shell is the third shell which have eighteen number of electrons, and so on. These variable capacities of atomic shells will calculate by following equation:


2(n)2

Where, n defined as the positioning number of atomic shell from the centrally placed nucleus. 



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