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unit 3 ch 2 science
5th grade science vocab unit e chapter 2
Question | Answer |
---|---|
nucleus | center of an atom |
element | substance made up of only one kind of atom |
proton | subatomic particle with a positive charge |
atom | smallest unit of an element with all the properties |
neutron | subatomic particle with no charge |
Periodic Table | arrangement of elements by similar properties |
compound | substance made up of the atoms of two or more elements |
molecule | tow or more atoms joined together |
electron | subatomic particle with a negative charge |