[" The chalcogen having same "],[" number of electrons both in "],[" penultimate and antipenultimate "],[" shells is "]

Which noble gas has same number of electrons both in ultimate and penultimate shells?

The chemical species having same number of electrons in the outermost and penultimate shell is

Number of electrons present in the penultimate shell of magnesium atom.

Which of the following has the same number of electrons in its outermost shell and penultimate shell ?

Which of the following has the same number of electrons in its outermost shell and penultimate shell ?

An element 'X' has its electronic configuration of 'K' shell is (n-5)s^(2) and it has total number of electrons in its outermost, penultimate and antipenultimate shell are 2,8 and 25 respectively then find out total number of unpaired electrons in element 'X' in their ground state.

An element 'X' has its electronic configuration of 'K' shell is (n-5)s^(2) and it has total number of electrons in its outermost, penultimate and antipenultimate shell are 2,8 and 25 respectively then find out total number of unpaired electrons in element 'X' in their ground state.