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John Dalton's theory said that all matter is made up of atoms. invisible and indestructible also all atoms of given element are identical in mass and properties. Compounds are formed by a combination of two or more different kinds of atoms.
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https://www.youtube.com/watch?v=_nLESblUAHY
J.J.Thompson did a experement
Plan projects on a visual timeline
Map milestones, phases, deadlines, and key events in one place so the sequence is easier to see and share. Timetoast is a timeline maker for work, school, research, and stories.