Which one of the following constitutes a group of the isoelectronic species?

(a) The mighty Himalayas in the north and the vast Indian Ocean, the Arabian Sea and the Bay of Bengal in the south west and east respectively provide a natural...

The atoms or ions which have the same number of electrons are called isoelectronic species.

i. The radii of isoelectronic species vary according to actual nuclear charge. Larger nuclear charge exerts greater attraction on the electrons and thus, the radius of that isoelectronic species becomes smaller. ii....

D) Grass, Fish and Goat

(B) Ongole breed ox

Sr. no. Property Down a group i Atomic radii Increases ii Ionic radii Increases iii Ionization enthalpy Decreases iv Electronegativity Decreases v Standard reduction potential Decreases

Correct option: (C) Family

(i - d),  (ii - a),  (iii - b),  (iv - c).

Correct Answer - D See Comprehensive Review.

(i) True (ii) False (iii) True (iv) False