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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 |