1. In activity series, elements below Hydrogen cannot displace Hydrogen because
2. When two elements combine together chemically, they form a
3. The most reactive metal in the reactivity series is
4. Metals tend to lose electrons and form
5. Reactivity series of metals, the more reactive metals are at the .....
6. Which of the following chemical equations shows the product of water reacting with potassium oxide
7. The chemical formula of sodium trioxocarbonate (IV) is
8. A reaction that involves the exchange of radicals is called
9. The mass number of Calcium is
10. State symbols are used to ........ in a chemical equation
