Kemi Joner att kunna

Kemi Joner att kunna - an exercise made by HagaN24a on Spellic.com.
1. Fold the right part of the paper back so that you can't se the answers.
2. Write the correct answer in the space below each question.
3. When done, fold the paper back and compare your answers.
Karbonatjon
Nitratjon
Hydroxidjon
Fosfatjon
Sulfatjon