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Plastic Natural and synthetic compounds of usually high molecular weight consisting of millions of repeated linked units, each of which is a light and simple molecule. |
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Metal Electropositive elements that usually have a shiny surface. They are generally good conductors of heat and electricity. They can be melted or fused, hammered into thin sheets or drawn into wires. Typical metals form salts with non metals, basic oxides with oxygen, and alloys with one another. Select a metal below for more information: |