Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how


Common and Special Polyatomic ions

NH4+ ammonium ion
H3O+ hydronium ion
OH- hydroxide ion
CN- cyanide ion
SCN- thiocyanate ion
O2 ^2- peroxide ion
CrO4 ^2- chromate ion
MnO4- permanganate ion
CH3COO- or C2H3C2- acetate ion
C2O4 ^2- oxalate ion
NO3- nitrate ion
NO2- nitrite ion
SO4 ^2- sulfate ion
HSO4- hydrogen sulfate (bisulfate) ion
SO3 ^2- sulfite ion
HSO3- hydrogen sulfite (bisulfite) ion
CO3 ^2- carbonate
HCO3- hydrogen carbonate (bicarbonate) ion
BO3 ^3- borate ion
S2O3 ^2- thiosulfate ion
ClO4- Perchlorate
ClO3- Chlorate
ClO2- Chlorite
ClO- Hypochlorite
BrO4- Perbromate
BrO3- Bromate
BrO2- Bromite
BrO- Hypobromite
IO4- Periodate
IO3- Iodate
IO2- Iodite
IO- Hypoiodite
PO4 ^3- Phosphate
PO3 ^3- Phosphite
PO2 ^3- Hypophosphite
HPO4 ^2- hydrogen phosphate ion
H2PO4- dihydrogen phosphate ion
Created by: tzone808