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Fill in the blanks :1. ______ is the smallest particle of a chemical element. 2. The ______ are combination of atoms of various elements or the same element. 3. According to John Dalton, atom is a hard, solid, ball and it is ______ 4. ________ compared an atom to a watermelon. 5. The particles that make up the atom are called _________ particles. |
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Answer» 1. Atom 2. molecules 3. indivisible 4. J.J. Thomson 5. sub-atomic |
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