How many elements are there in 6^(th) pe...

How many elements are there in `6^(th)` period? Prove it.

Text Solution

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In sixth period, 32 elements are present. This period starts with the filling of `6^(th)` energy shell, n=6. There are sixteen orbitals (one 6s, seven 4f, five 4d and three 6p) to be filled. These sixteen orbitals can accommodate 32 `(16xx2=32)` electrons. Hence, 32 elements are present in sixth period.

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