Metal and nonmetals
1. Why are metals good conductors of electricity? Metals are good conductors of electricity because they contain free electrons. These free electrons move easily through the metal and conduct electric current. 2. Which property of graphite is utilised in making electrodes? Graphite is a good conductor of electricity. Due to this property, graphite is utilised in making electrodes. 3. Which of the following metals will melt at body temperature? Gallium, Magnesium, Caesium, Aluminium Gallium and caesium will melt at 37°C (body temperature). 4. Name two metals that do not react with water at all. Lead and copper. 5. What happens when calcium is treated with water? Calcium reacts less violently with water and bubbles of hydrogen gas stick to its surface. 6. Generally, non-metals are not lustrous. Name a non-metal which is lustrous. Iodine 7. What is the nature of non-metal oxide? Non-metal oxides are acidic or neutral in nature. 8. What is the nature of metal oxides? Me...