A, B, C, D and E( Radium not included) are the elements belonging to Second group of Modern periodic table. The correct trend of metallic radius for these elements is C > E > D > A > B. The element ‘E' in the sequence is
A) Atomic radius…Be<Mg<Ca<Sr<Ba ;
B) IP1…..Be>Mg>Ca>Sr>Ra>Ba;
C) EN…..Be>Mg>Ca=Sr>Ba>Ra;
D) MP…Be>Ca>Sr>Ba>Ra>Mg ;
E) BP…Be>Ba>Ra>Ca>Sr>Mg ;
F) Density…..Ra>Ba>Sr>Be>Mg>Ca ;
G) Abundance in Earth's crust….Ca>Mg>Ba>Sr>Be>Ra ;
H) Hydration Enthalpy….Be2+>Mg2+>Ca2+>Sr2+>Ba2+
I) values are negative.
Most negative for Ra=Ba and least negative for Be.
J)
Best reducing agent is Ra=Ba, best oxidant is Be2+;
K) Reducing power…Be<Mg<Ca<Sr<Ba=Ra ;
L) Oxidizing power… Be2+ > Mg2+ > Ca2+ > Sr2+ > Ba2+ = Ra2+ ;