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Chp.1.1-UnitD
Atomic Structure and the Periodic Table
Question | Answer |
---|---|
proton | a positively charged particle |
neutron | an uncharged particle |
nucleus | the combination of protons and neutrons at the center of an atom. has a positive charge because of protons |
electrons | negatively charged particles that move around outside the nucleus |
atomic number | the number of protons in the nucleus of an atom |
atomic mass number | the total number of protons and neutrons in an atom's nucleus |
isotope | an atom of one element that has a different number of neutrons than another atom of the same element |
ion | an atom or group of atoms that has a positive or negative electric charge |