Question

The diagram below shows a part of the skelecton of the periodic table in which elements are indicated by letters which are not their usual symbols.
Which one of the following statement is correct?

• A. The greatest ionic character of compounds formed by reaction of pairs of the listed elements would be exhibited by the compounds with the formula $M_2$
• B. The $J^{2+}$ ion is colored and has an electronic configuration of $1s^2,2s^2,2p^6,3s^2,3p^6,3d^7$
• C. Element R is a gas at room temperature
• D. Element T is an inert gas with an electronic configuration $1s^2,2s^2,2p^6,3s^2,3p^6,3d^{10},4s^2,4p^6$

Answer 1

Answer: (D)

Element T is an inert gas with an electronic configuration $1s^2,2s^2,2p^6,3s^2,3p^6,3d^{10},4s^2,4p^6$

i) $M_2$ doesn't exist because M is most metallic and it only forms ionic compound with non-metals.
ii) $J^{2+}-\left[Ar\right]3d^8$
iii) R is Sulphur which is solid in nature at room temperature.
iv) T is an inert gas with electronic configuration $1s^2,2s^2,2p^6,3s^2,3p^6,3d^{10},4s^2,4p^6$