NCERT Class XI Chemistry Classification of Elements and Periodicity in Properties Solutions

Question : 22

Total: 40

What is the basic difference between the terms electron gain enthalpy and electronegativity?

Solution:

Electron gain enthalpy	Electronegativity
1. It provides a measure of the ease with which an atom adds an electron to form an anion.	It is a qualitative measure of the ability of an atom in a chemical compound to attract shared electrons to itself.
2. It has an absolute value.	It is not a measurable quantity.
3. Its periodicity is not regular in a period or in a group.	The periodicity is regular in a period but not so regular in a group.
4. Its units are electron volts per atom or kilojoules per mole or kilocalories per mole.	It has no units but is merely a number.

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