If a shell can hold a maximum of 32 electrons what is the value of n

  The correct answer is : The maximum amount of electrons that can be in a given layer is given by   2n ^ 2,

2n ^ 2 = 32      

n ^ 2 = 32/2    

n ^ 2 = 16

therefore,  n = 4

Explanation:  2n ^ 2 means that in the first layer 2 electrons can fit with n = 1, in the second layer they fit 8 electrons with n = 2, in the third they fit 18 electrons with n = 3 and in the fourth layer they fit 32 electrons with n = 4

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is the correct answer!