What is the subshell in which the last electron of the first element in the 6th period enters?
What is the subshell in which the last electron of the first element in the 6th period enters?
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The 6th period begins by filling the last electron in the shell with n = 6. The lowest energy subshell of any shell is ‘s’.
Therefore, the last electron of the first element in the 6th period enters the subshell ‘6s’.
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