Question

write the valency and formulae of the following elements:a) ammonium) calcium) ferric) oxide) nitride) hydroxide) cupric) barium

Answer 1

Answer:

1.NH3 - +1

2.Ca - +2

3. Fe - +3

4. O2 - -1

5. N - -3

6. OH - -1

7. Cu - +2

8. Ba - +2