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0. First and second ionisation energies of magnesium are 7.646 eV and 15.035 eV respectively. The amount of energy in kJ needed to convert all the atoms of magnesium into Mg2+ ions present in 12 x 10-3 g of magnesium vapour is [1 eV atom-1 = 96.5 kJmol-1] (NTSE Andhra Pradesh, Stage-I, 2014-15)
2.0
1.5
1.1
0.5
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