Among the second period elements the actual ionisation enthalpies are in the order `LiltBltBeltCltOltNltFltNe`.
Explain why (a) Be has higher `Delta_(i)H` than `B` and (b) `O` has lower `Delta_(i)H` than `N` and `F`?

Among the second period elements the actual ionisation enthalpies are in the order Li lt B lt Be lt C lt O lt N lt F lt Ne. explain why? (1) Be has higher Delta_(i) H than B (2) O has lower Delta_(i)H than N and F?

Among the second period elements the actual ionisation enthalpies are in the order Li lt B lt Be lt C lt O lt N lt F lt Ne . Explain why? Be has higher (Delta_iH)_1 than B

Among the second period elements the actual ionisation enthaply are in the order Li lt B ltBe lt C lt O ltN lt F lt Ne. Expalin why Be has higher Delta IH than B.

Among the second period elements the actual ionisation enthalpies are in the order Li lt B lt Be lt C lt O lt N lt F lt Ne . Explain why? O has lower (Delta_iH)_1 than N and F ?

Among the second period elements the actual ionisation enthaply are in the order Li lt B ltBe lt C lt O ltN lt F lt Ne explain why O has lower Delta IH than N and F ?

Among the third period elements, the actual ionization enthalpies are in the order Na lt AI lt Mg lt SI lt S lt Plt CI lt Ar . Explain why: (i) Mg has higher Delta_(i)H than AI . (ii) S has lower Delta_(i)H than P and CI .

Among the third period elements, the actual ionization enthalpies are in the order Na lt AI lt Mg lt SI lt S lt Plt CI lt Ar . Explain why: (i) Mg has higher Delta_(i)H than AI . (ii) S has lower Delta_(i)H than P and CI .