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or stability due higher than that of O Further the effect of increased nuclear charge outweights the to exactly half filled orbitals therefore the A H of N and O are lower than that of F 3 17 How would you explain the fact that the first ionization enthalpy of sodium is lower than that of magnesium but its second ionization enthalpy is higher than that of magnesium Ans The F C of Na is 1 5 25 2n6 35 and E C of Me is 1s 25 2p6 352 In both the cases first electron is to
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