1. Metals that can be easily beaten into sheets are known as _______ metals.   malleable   ductile   beatable   polymer   Hint Half-n-half Clue   2. Sodium is very reactive and may burn on exposure to air. Therefore, it is kept under _______.   oil   acids   water   ice   Half-n-half Clue   3. Brass is _______.   a compound   a mixture   an element   an alloy   Half-n-half Clue   4. Which metal is extracted from the ore 'bauxite'?   Tungsten   Aluminum   Gold   Iron   Half-n-half Clue   5. Metals are usually good conductors of heat and electricity.   True   False   6. To prevent corrosion, metals are often galvanized by covering them with a layer of _______.   sodium   zinc   tin   copper   Half-n-half Clue   7. An alloy is _______.   an element in the impure form   a compound of three elements   a solid solution of two or more metals   a mixture of three elements   Half-n-half Clue