Electron gain enthalpy and ionisation enthalpy are the properties of isolated atom whereas electronegativity is the property of atoms in molecules. These are,directly or indirectly related to electronic configurations of atoms.
Write the electronic configuration of the elements with atomic number nine, 11, 21 and 36. Stating reasons predict the
following form of configurations:
(i) Which of them has the lowest lowest ionisation enthalpy? (ii) Which of them has the highest negative electron gain
enthalpy ?
(iii) Which of them has the positive electron gain in enthalpy?
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Answer: (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. ... Electron gain enthalpy of an element is constant.
Explanation:
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