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Give the reasons for the following: (a) Fluorine has less negative electron gain enthalpy than chlorine (b) Noble gases tend to be less reactive (c) First ionization enthalpy of Mg is more than that of Na but second ionization enthalpy of Mg is less than that of Na. |
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Answer» (a) It is due to more inter electronic repulsion in fluorine atom due to smaller atomic size than chlorine. (b) It is because they have stable electronic configuration, i.e., their octet is complete except He. (c) First ionization energy of Mg is more than that of Na because it has smaller atomic size but 2nd ionization of Mg is less because after losing one electron sodium acquires nearest noble gas configuration. |
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