A) Isoelectronic species have dissimilar ionic radii
B) Be and Al does not show diagonal relationship
C) Outer electronic configuration of halogen is \[n{{s}^{2}}.n{{p}^{7}}\]
D) In any period atomic radius of noble gas is the highest
Correct Answer: B
Solution :
In Periodic Table, Be and Al are present at diagonally opposite positions. Thus, they exhibit diagonal relationship. Elements of second period show great resemblance in properties with the elements present diagonally opposite in the third period. This is called diagonal relationship.
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