Verified Solution • 2025–26 Session
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QNEET-2019-Ch-773: NEET 2019 Chemistry - Class 11 NEET-2019-Ch-773 Solution: For the second period elements the correct increasing order of…
For the second period elements the correct increasing order of first ionization enthalpy is: Li < B < Be < C < N < O < F < Ne Li < Be < B < C < O < N < F < Ne Li < B < Be < C < O < N < F < Ne Li < Be < B < C < N < O < F < Ne
Multiple Choice Options
- A Li < B < Be < C < N < O < F < Ne
- B Li < Be < B < C < O < N < F < Ne
- C Li < B < Be < C < O < N < F < Ne
- D Li < Be < B < C < N < O < F < Ne
Step-by-Step Verified Solution
Ionisation enthalpy increases in a period from left to right, because of increased nuclear charge and decrease in atomic radii. But because of half filled orbitals of Be, N and fully filled orbitals of Ne, stability of those atoms inceases.
So, the correct increasing order of first
ionisation enthalpy will be :
Li < B < Be < C < O < N < F < Ne