The first ionization energies (in kJ mol -1 ) of four consecutive elements of the second period are given in the options. The first ionization energy of nitrogen is

Question

The first ionization energies (in kJ mol -1 ) of four consecutive elements of the second period are given in the options. The first ionization energy of nitrogen is (A) 1086 (B) 1402 (C) 1681 (D) 1314

Tardigrade Admin · Accepted Answer

The first ionisation energy of nitrogen is

1402 k J / m o l

. Due to the half filled stable configuration of nitrogen it has maximum ionisation potential.
On left to right in periodic table, effective nuclear charge is increasing and ionisation energy also increasing.

N \to 2 s^{2} 2 p^{3}

(stable half-filled orbital)

O \to 2 s^{2} 2 p^{4}

(partially finled orbital)
easily lose outer
So.

B, C

and So, B,

C, N

and

O

have ionisation energy 1086 ,

1314, 1402, 1681

respectively.
Hence, nitrogen have

1402 k J / m o l

energy.

Q. The first ionization energies (in kJmol−1 ) of four consecutive elements of the second period are given in the options. The first ionization energy of nitrogen is

1086

1402

1681

1314

Q. The first ionization energies (in $k J m o l^{- 1}$ ) of four consecutive elements of the second period are given in the options. The first ionization energy of nitrogen is