The electronic configuration of Pt (atomic number 78) is:
Element "E" belongs to the period 4 and group 16 of the periodic table. The valence shell electron configuration of the element, which is just above "E" in the group is
The correct order of increasing ionic radii is
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : The ionic radii of O2$$-$$ and Mg2+ are same.
Reason (R) : Both O2$$-$$ and Mg2+ are isoelectronic species.
In the light of the above statements, choose the correct answer from the options given below.