Difference between physical and chemical change or metal or non - metal.
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Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.
Metals Non-Metals
Metals are solids at room temperature.Except for mercury which is a liquid metal. Non-metals may be solid, liquid or gases at the room temperature.
Metals are strong and tough. Non-metals are not strong or tough.
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