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Chemistry · Classification of Elements and Periodicity in Properties

हिन्दी

What is the sign of ionization enthalpy for the removal of an electron from a gaseous atom?

  1. Always positive (\( \Delta_i H > 0 \))
  2. Always negative (\( \Delta_i H < 0 \))
  3. Always zero (\( \Delta_i H = 0 \))
  4. Can be positive or negative depending on the element

Correct answer · Option 1

Always positive (\( \Delta_i H > 0 \))

Explanation

Energy is always required to overcome attractive forces when removing an electron, making ionization enthalpies always positive.
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