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Question
The electronic configuration of the atom having maximum difference in first and second ionisation energies is
Options
1s2, 2s2, 2p6, 3s1
1s2, 2s2, 2p6, 3s2
1s2, 2s2, 2p6, 3s2, 3s2, 3p6, 4s1
1s2, 2s2, 2p6, 3s2, 3p1
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Solution
1s2, 2s2, 2p6, 3s1
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