Which of the following orders is incorrect ?

Options

A. `N lt O lt F-II^(nd)` ionization energy.
B. `Li^(+) gt Na^(+) gt K^(+) -` ionic radius in water.
C. `S gt Se gt O -` negative value of electron gain enthalpy
D. `Al_(2)O_(3) lt MgO lt K_(2)O -` basic character.

Answer

1

Explanation

`N lt F lt O :` oxygen has highest `2^(nd)` ionization energy on account of half filled valance shell electron configuration. `ns^(2)np^(3)`.