1. Which of the following metals is a liquid at room temperature?   Sodium   Mercury   Cadmium   Tungsten   Hint Half-n-half Clue   2. With which metal does oxygen combine to form rust?   Iron   Gold   Silver   Platinum   Half-n-half Clue   3. Which of the following metals is often found in the pure state?   Gold   Magnesium   Aluminum   Iron   Half-n-half Clue   4. Which of the following does not belong to this group?   Lead   Iron   Sodium   Oxygen   Half-n-half Clue   5. Fill in the missing word: _______ + oxygen = Magnesium oxide   carbon   manganese   metal   magnesium   Half-n-half Clue   6. Rust on iron is basically _______.   an oxide   a sulphide   a nitride   a chloride   Half-n-half Clue   7. Metals that can be easily drawn into wires are known as _______ metals.   polymer   ductile   stretchable   malleable   Half-n-half Clue