Question

one electron is present in the outermost shell of the atom of an element 'Z'. What will be the nature of this element

Answer 1

Gaseous nature is answer

Answer 2

Since one electron is present in the outermost shell, so this element can either belong to the alkali metal family or it can be hydrogen. In both the cases, after removal of 1 electron from this element, it will form univalent cation.

For example :- H → H+ + e-

 Na → Na+ + e-