Identify the least stable ion amongst the following :
A.
$$L{i^ - }$$
B.
$$B{e^ - }$$
C.
$${B^ - }$$
D.
$${C^ - }$$
Answer :
$$B{e^ - }$$
Solution :
NOTE THIS STEP: Write configuration ofall species. Half filled and full filled orbitals are more stable as compared to nearly half filled and nearly full filled orbitals.
$$L{i^ - } = 1{s^2},2{s^2};B{e^ - } = 1{s^2},2{s^2},2{p^1}$$
$${B^ - } = 1{s^2},2{s^2},2{p^2}:\,{C^ - } = 1{s^2},2{s^2},2{p^3}$$
∴ $$B{e^ - }$$ will be least stable. It has lowest I.E.
Releted MCQ Question on Inorganic Chemistry >> Chemical Bonding and Molecular Structure
Releted Question 1
The compound which contains both ionic and covalent bonds is