Question

choose correct option with reason ..

Answer 1

in the following list stable is ,

Be- is the least stable ion,

$(1 {s}^{2} {2s}^{2} )$
has stable electronics configurations addition to electron decreases stability.


option (b)



be brainly

Answer 2

b) NOTE THIS STEP : Write configuration of all species. Half filled and full filled orbitals are more stable as compared to nearly half filled and nearly full filled orbitals.

Li = 1s2, 2s2; Be- = 1s2, 2s2, 2p1

B- = 1s2, 2s2, 2p2 ; C- = 1s2, 2s2, 2p3

Be– will be least stable. It has lowest I.E.