Question

In the modern periodic table one of the following
does not have appropriate position –
(a) transition elements
(b) inert gases
(c) inner transition elements
(d) halogens

Answer 1

(c) inner transition elements

Explanation:

For inner transition elements, the d− subshells are filled with electrons monotonically with increase in atomic number. The d− sub shells are not filled with electrons monotonically with increase in atomic number. There are some exceptions lik Cr, Cu etc. So the inner transition elements do not have appropriate position in the modern periodic table.

Option C is the answer.