Question

Which of the following oxides is paramagnetic?

• A. SO$_2$
• B. NO$_2$
• C. SiO$_2$
• D. CO$_2$

Hint:

Using a simple frame or just bolding for the box Key Points: Paramagnetic substances have unpaired electrons and are attracted to magnetic fields. Diamagnetic substances have all electrons paired and are weakly repelled by magnetic fields. Molecules with an odd total number of valence electrons are typically paramagnetic. Molecules with an even total number of valence electrons are typically diamagnetic (important exception: O$_2$).