For the second period elements the correct increasing order of first ionization enthalpy is [2019]

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Q.
For the second period elements the correct increasing order of first ionization enthalpy is [2019]

1 Li < Be < B < C < O < N < F < Ne

2 Li < Be < B < C < N < O < F < Ne

3 Li < B < Be < C < O < N < F < Ne

4 Li < B < Be < C < N < O < F < Ne

Ans.
(3)

As we move across a period, ionisation enthalpy increases, because of increased nuclear charge and decrease in atomic radii. However, abnormal values are observed for Be, N and Ne due to extra stability of half filled and fully filled orbitals. Thus, the actual order is,
Li < B < Be < C < O < N < F < Ne.

Solution

Q.
For the second period elements the correct increasing order of first ionization enthalpy is [2019]

1 Li < Be < B < C < O < N < F < Ne

2 Li < Be < B < C < N < O < F < Ne

3 Li < B < Be < C < O < N < F < Ne

4 Li < B < Be < C < N < O < F < Ne

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Solution

Q. For the second period elements the correct increasing order of first ionization enthalpy is [2019]

1 Li < Be < B < C < O < N < F < Ne

2 Li < Be < B < C < N < O < F < Ne

3 Li < B < Be < C < O < N < F < Ne

4 Li < B < Be < C < N < O < F < Ne

Want Us to Email you About Special Offers & Updates?

Q.
For the second period elements the correct increasing order of first ionization enthalpy is [2019]