dalton's ideas about matter	-the elements are made up of discretes particles of matter(atoms) which are indivisible and inarterable -all the atoms of a single element are same size and mass -compounds are formed when tge atoms of the differents elements join together -in a chemical reaction, the atoms regroup, such that they are aggared differently how they were before. however,there are not created or destroyed.	4 points
the law of conservation of mass	-in a chemical reaction matter is neither created not destroyed, but simply transform -the mass of the subtances that start the reactis the same as mass of the subtances produced
examples of conservation of mass

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