Q2. Think and Answer: (answer in no more than 50 words)
a. Compare the smallest particle of a substance that can take part in chemical reaction with the one that can exist independently.
b. How do elements in a mixture exist differently from elements in a compound? Use a T-chart to distinguish between the two.
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a) An atom is the smallest particle of an element that can take part in a chemical reaction but may or may not exist independently. e.g. atoms of oxygen, chlorine and a few other elements are unstable independently, so they join to form a molecule which is more stable and independent in nature.
b) Compounds are substances made from atoms of different elements joined by chemical bonds. They can only be separated by a chemical reaction.A mixture is made by simply mixing together elements and compounds. No new chemical bonds are formed.
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