Question

Formation of anion from a neutral atom $X$ is favoured by :

• A. high electron affinity
• B. large size of $X$
• C. low ionisation potential
• D. high charge on anion $X$

Answer 1

Answer: (A)

high electron affinity

An anion is formed when a neutral atom accepts an electron. Formation of anion will be favoured by high electron affinity which is the energy released when an electron is added to a neutral atom or molecule in the gaseous state to form a negative ion. Higher the amount of energy releases, easier will be the anion formation.