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Science Vocab.
Chapter 3 Vocab
Question | Answer |
---|---|
element | chemical substances that can not be divided or split into something smaller and make up all matter on Earth |
atom | consists of a nucleus of protons and neutrons with electrons circling this nucleus. |
nucleus | |
proton | |
neutron | |
atomic number | |
mass number | |
electron | |
energy level | |
valence electron | |
isotope | |
atomic mass | |
radioactivity |