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The correct order of electron gain enthalpy with negative sign of f,cl,br and i having atomic number 9,17,35,53 respectively is |
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Answer» These are the group 17 elements arranged in order as we move down the group. Thus the correct order of decreasing electronegativity will be Cl Br I The electronegativity decreases as we move down the group. But the electron gain enthalpy of Cl is more than that of F because of the small SIZE of F which LEADS to REPULSION in the electrons. |
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