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jenny-atom

QuestionAnswer
atomic mass the "weight" of an atom- the same as the mass number
atom the smallest unit of matter
scientific evidence collection of observations that many people have made. everyone agrees on the same collection of observations.
scientific model an idea that allow us to create an explanation of how we think some part of the world works similar to a theory.
mass number number of protons plus the number of neutrons
atomic number number of protons in the nucleus of an atom.
Created by: mizsjenny
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