What are the advantages of plastics

Advantages of plastic are corrosion resistant and chemically inert. They have low thermal expansion of co-efficient and possess good thermal and electrical insulating property. Advantages of plastic is very good water resistant and possess good adhesiveness. Plastic is strong, good and cheap to produce.

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the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

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