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science 5 test matte
Question | Answer |
---|---|
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 |