The first ionisation potential of nitrogen and oxygen atoms are related as follows

Options

A. The ionisation potential of oxygen is less than the ionisation potential of nitrogen
B. The ionisation potential of nitrogen is greater than the ionisation potential of oxygen
C. The two ionisation potential values are comparable
D. The difference between the two ionisation potential is too large

Answer

A, B, C

Explanation

Due to stable half-filled valence subshell of nitrogen, its first ionization potential is slightly greater than that of oxygen.