1. Which of the following metals is a liquid at room temperature?   Sodium   Tungsten   Mercury   Cadmium   Hint Half-n-half Clue   2. To prevent corrosion, metals are often galvanized by covering them with a layer of _______.   tin   zinc   copper   sodium   Half-n-half Clue   3. Which metal is extracted from the ore 'bauxite'?   Iron   Tungsten   Gold   Aluminum   Half-n-half Clue   4. Fill in the missing word: _______ + oxygen = Magnesium oxide   manganese   metal   carbon   magnesium   Half-n-half Clue   5. If a metal's ore is titled 'pyrites', then it most probably contains _______.   oxygen   nitrogen   sulfur   chlorine   Half-n-half Clue   6. Metals are usually good conductors of heat and electricity.   True   False   7. Rocks that are rich in metals are known as _______.   ores   metalloids   allotropes   slag   Half-n-half Clue