Question

Define Electron affinity

Answer 1

• Electron affinity is the amount of energy released when an electron is added to a neutral atom to form an anion.
• Electron affinity increases moving left to right across a period due to its increased nuclear attraction.
• It decreases while moving down a group as an electron gets added and moves farther from the nucleus.
• Factors that affect electron affinity are atomic size and nuclear charge.
• Greater electron gain enthalpy if the atomic size is small and greater the nuclear charge more will be the value of electron gain enthalpy