Question

Electron gain enthalpy of noble gasses is positive.

• A. True
• B. False

Answer 1

The correct option is A True

• Electron gain enthalpy of an element is the energy released when a neutral isolated gaseous atom accepts an extra electron to form the gaseous negative ion i.e. anion.
  
• The atoms of these elements have completely filled subshell. As a result, there is no room in their valence orbitals and the additional electron has to be placed in an orbital of next higher shell. As a result, energy has to be supplied to add on additional electrons.
  
• Hence,option A is correct answer.