1. Which of the following metals is a liquid at room temperature?   Tungsten   Cadmium   Sodium   Mercury   Hint Half-n-half Clue   2. Metals are obtained from their oxides by the process of _______.   oxidation   electrolytic separation   reduction   roasting   Half-n-half Clue   3. Sodium is very reactive and may burn on exposure to air. Therefore, it is kept under _______.   oil   water   ice   acids   Half-n-half Clue   4. Which of the following metals is often found in the pure state?   Magnesium   Aluminum   Gold   Iron   Half-n-half Clue   5. Metals that can be easily beaten into sheets are known as _______ metals.   polymer   beatable   ductile   malleable   Half-n-half Clue   6. Iron is magnetic in nature.   True   False   7. Metals are usually good conductors of heat and electricity.   True   False