Honors Chem - Ions and Diatomics - MEMORIZATION

These 20 polyatomics are the most frequent found in chemistry and are required for memorization. There are 7 diatomics that are covalently bonded non-metals that must also be memorized as they always travel in pairs when not bonded with other elements.

Quiz by

Rate:

Last updated: November 12, 2025

You have not attempted this quiz yet.

More quiz info >>

First submitted	November 12, 2025
Times taken	9
Average score	81.5%
Report this quiz	Report

Quiz and answer stats >>

Friends stats >>

4:00

Enter answer here

/ 27 guessed

The quiz is paused. You have remaining.

Copied!

Scoring

You scored / = %

This beats or equals % of test takers also scored 100%

The average score is

Your high score is

Your fastest time is

more stats >>

friends stats >>

Keep scrolling down for answers and more stats ...

Chemical Formula	Compound Name
ClO₄⁻¹	Perchlorate
CN⁻¹	Cyanide
PO₃⁻³	Phosphite
Cr₂O₇⁻²	Dichromate
ClO⁻¹	Hypochlorite
ClO₂⁻¹	Chlorite
C₂H₃O₂⁻¹	Acetate
PO₄⁻³	Phosphate
NO₃⁻¹	Nitrate
NO₂⁻¹	Nitrite
MnO₄⁻¹	Permanganate
OH⁻¹	Hydroxide
SO₃⁻²	Sulfite
ClO₃⁻¹	Chlorate
SO₄⁻²	Sulfate
SCN⁻¹	Thiocyanate
CrO₄⁻²	Chromate
SiO₃⁻²	Silicate
CO₃⁻²	Carbonate
NH₄⁺¹	Ammonium
H₂	Hydrogen
N₂	Nitrogen
O₂	Oxygen
F₂	Fluorine
Cl₂	Chlorine
Br₂	Bromine
I₂	Iodine