Question #a9dd1

1 Answer
Darshan Senthil
Nov 30, 2017

There are many, but the two you're likely being asked for are:

  • Hydroxide (#OH^-#)
  • Ammonium (#NH_4^+#)

Explanation:

There are many polyatomic ions that don't end in "-ite" or "-ate". For example:

  • Hydroxide (#OH^-#)
  • Ammonium (#NH_4^+#)
  • Cyanide #(CN^-)#
  • Peroxide (#O_2^(2-)#)

The first 2 are likely the ones that you're being asked for -- they're extremely common across general chemistry, and it will do you credit to have them memorized.

Hope that helped :)

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