F. Explain : electronegativity and electron
gain enthalpy. Which of the two can be
measured experimentally?
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Answer:
electronegativity
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(1) Electronegativity is the ability of an atom in a compound to attract shared electrons of a covalent bond to itslef. Electron gain enthalpy is the change in the enthalpy accompanying the addition of an electron to gaseous neutral atom forming a gaseous anion.
(2) Electronegativity of any given element is not constant, but depdnds upon the other element to which is bound in a compound. Electron gain enthalpy of an element is constant.
(3) Electronegativity cannot be measured experimentally. It is obtained from numerical scale of electronegativity developed mainly by Linus Pauling Electron gain enthalpy is a measurable property
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