Q1. What is valency of an element?
Q2. What is the valency of Cl in HCl?
Q3. What is the valency of nitrate radical in Nitric acid and sulphate radical ion in sulphuric acid?
Q4. What is the valency of elements which do not combine with hydrogen?
Q5. Explain the valency of an element in electronic state.
Q6. What are univalent or monovalent ions?
Q7. What are cations?
Q8. Give examples of univalent,divalent and polyvalent cation
Q9. Explain the law of constant composition
Q10. What is the law of conservation of mass?