the element of second period having highest ionization energy
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Explanation:
The Charge on the Nucleus Increases and Size Decreases
Element Electron Configuration Ionization Energy
Lithium (Li) [He]2s1 520 kJ/mol
Beryllium (Be) [He]2s2 899 kJ/mol
Boron (B) [He]2s22p1 801 kJ/mol
Carbon (C) [He]2s22p2 1086 kJ/mol
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