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Consider the following ionization energies for a metal M M_((g)) to M_((g))^(+)+e^(-) , DeltaH=+580 kJ/mole M_((g))^(+) to M_((g))^(2+) + e^(-), DeltaH =+1815 kJ/mole M_((g))^(2+) to M_((g))^(3+) + e^(-) , DeltaH=+2740 kJ/mole M_((g))^(3+) + M_((g))^(4+) + e^(-) , DeltaH= + 11600 kJ/mole Total no. of electron(s) in outermost shell of metal M are:

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Answer :B


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