Question

Consider the following statements.
(I) Rutherford's name was associated with the development of periodic table.
(II) A metal M having electronic configuration $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^1$ is d-block element.
(III) Diamond is an element.
(IV) The electronic configuration of the most electronegative element is $1s^{2}2s^{2}2p^5$.
The correct statements are :

• A. I, II, IV
• B. I, II, III, IV
• C. II, IV
• D. I, III, IV

Answer 1

The correct option is C II, IV

1) Mendeleev name was associated with the development of periodic table.
2) The d-block elements have general electronic configuration [noble gas] $(n-1)d^{1-10}n{s}^{1-2}$. It is configuration of copper which belongs to d-block and group number ${11}^{th}$.
3) Diamond is not an element. It is an allotrope of carbon.
4) Fluorine is the most electronegative element with atomic no. 9 and electronic configuration $1s^{2}2s^{2}2p^5$.