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Topic 8 Vocabulary
Parts of the Atom
Term | Definition |
---|---|
atom | Building blocks of all matter |
proton | particle of the atom with a positive charge |
nucleus | particle of the atom with a neutral charge |
electron | particle of the atom with a negative charge |
nucleus | center of the atom that holds the protons and neutrons |
shells OR orbitals | area around the outside of the nucleus that holds the electrons |
atomic number | identifies an atom by telling the number of protons in an atom |
atomic mass | the protons and neutrons together in the atom |
isotope | an atom with a different number of neutrons than most of the atoms of that element |
Periodic Table of Elements | A chart that identifies each element in order by atomic number |