Question

For the second period elements the correct increasing order of first ionization enthalpy is

Answer 1

Explanation:

For the second period elements the correct increasing order of first ionisation enthalpy is: (1) Li < Be < B < C < N < O < F < Ne (2) Li < B < Be < C .Hope this would be helpful to you.

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Answer 2

Correct option (2) Li < B < Be < C < O < N < F < Ne

Explanation: Be’ and ‘N’ have comparatively more stable valence sub-shell than ‘B’ and ‘O’. Correct order of first ionisation enthalpy is: Li < B < Be < C < O < N < F < Ne