Electron affinity is the

Options :
  1. energy absorbed when an electron is added to an isolated atom in the gaseous state
  2. energy released when an electron is added to an isolated atom in the gaseous state
  3. energy required to take out an electron from an isolated gaseous atom
  4. power of an atom to attract an electron to itself
Answer and Explanation :-

Answer: Option 2

Explanation:

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