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September 2021 0 86 Report
II. Find the Valency of:
1. Sulphide
2. Aurum
3. Nitrogen
4. Sulphate
5. Neon
6. Hydrogen
7. Carbon
8. Potassium
9. Plumbic
10.Ferrous
11. Chlorate
12. Chloride
13. Ferric
14. Cuprous
15. Cupric
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