1. With which metal does oxygen combine to form rust?   Platinum   Gold   Silver   Iron   Hint Half-n-half Clue   2. What are metals that can be stretched easily known as?   Ductile Metals   Malleable Metals   Polymer Metals   Stretchable Metals   Half-n-half Clue   3. Metals are usually good conductors of heat and electricity.   True   False   4. An alloy is a   Mixture   Solid Solution of two or more metals   Element in impure form   Compound of three elements   Half-n-half Clue   5. Which of the following does not belong to the group?   Sodium   Oxygen   Lead   Iron   Half-n-half Clue   6. Rocks rich in metals are known as   Allotropes   Ores   Slag   Metalloids   Half-n-half Clue   7. Which of the following metals is often found in pure state?   Iron   Gold   Magnesium   Aluminum   Half-n-half Clue