Question

Which of the following molecules is not an odd electron species?

• A. $H_{2}O$
• B. $NO$
• C. $N{O}_2$
• D. $Cl{O}_2$

Answer 1

The correct option is A $H_{2}O$

In $H_{2}O$, the total number of valence electrons are $(1\times 2)+6=8$


In $NO$, the total number of valence electrons are $5+6=11$ (odd electron species)


In $N{O}_2$, the total number of valence electrons are $5+(2\times 6)=17$ (odd electron species)


In $Cl{O}_2$ , the total number of valence electrons are $7+(2\times 6)=19$ (odd electron species)