Question

Is the diatomic oxygen ion with a -1 charge diamagnetic or paramagnetic?

Answer 1

Paramagnetic.

Explanation:

Paramagnetic means attracted to a magnet, and unpaired electrons so that.

If you count the electrons in two oxygen atoms plus one more for the negative charge, you get 17 total electrons or 13 valence electrons, both odd numbers -- there must be an unpaired electron.