MCQ
The electronic configuration of an element is $\ce{1s^22s^22p^3}$. The number of unpaired electron in this atom are :
- ✓$3$
- B$5$
- C$7$
- D$1$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
${N_2}{O_4}(g)\, \to \,2N{O_2}(g)$
Data for the given reaction is
$\Delta H = +54\,kJ$ and $E_a = + 57.2\,kJ$
.......$kJ$