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science 5 test matte

what is the difference between mass and weight of an object mass is the amount of matter and weight is the pull of gravity on a object
atoms smallest bits of matter
1.electrons have ? charge,2.prtons have a ? charge, and 3,netrons have ? charge 1.negitive,2.postive,3.and no charge
? is made up of only one kind of atom or molecules pure element
if the atoms in the molicules are different it is a what compound
Created by: kimlsmith7