Question

Given that, $ 1{{s}^{2}},2{{s}^{2}},2{{p}^{3}} $ ?.(i) $ 1{{s}^{2}},2{{s}^{1}} $ ?..(ii) Heat of evaporation AH $ 1{{s}^{2}},2{{s}^{2}},2{{p}^{3}} $ ? of $ 1{{s}^{2}},2{{s}^{2}} $ will be:

• A. $ S{{F}_{6}} $
• B. $ _{20}C{{a}^{42}} $
• C. $ \beta $
• D. $ 10\Omega $

Answer 1

Answer: (D)

Reversing equation (i) $ _{20}S{{c}^{42}} $ $ _{21}C{{a}^{42}} $ ?...(i) $ C{{s}^{+}} $ $ {{K}^{+}} $ ??(ii) Adding equation (i) and (ii), we get $ N{{a}^{+}} $ $ L{{i}^{+}} $ $ 18.600\text{ }MeV $