Proton - Positive Charge, located in Nucleus, Electron - Negative Charge, Located in Electron cloud, Neutron - No Charge/Neutral, Located in Nuclus, Nucleus - most dense part of an atom; NEUTRAL CHARGE, Electron Cloud - Region in which the electrons are located, Atom - smallest particle of matter, Ion - Protons do NOT equal Electrons, Isotope - Protons do NOT equal Neutrons, Positive - Charge of a Proton, 2 - max # of electrons the FIRST energy level can hold, 8 - max # of electrons the SECOND energy level can hold, Ionic Bond - Atoms "transfer" or give away an electron(s), Covalent Bond - Atoms "share" electron(s), Valence Electron - Electron in the outmost energy level, Negative - Charge of an Electron, Period # REPRESENTS - # of Energy Levels IN AN ATOM, Family # REPRESENTS - # of Valence Electrons IN AN ATOM, PERIOD 3, FAMILY 3 - ALUMINUM, PERIOD 2, FAMILY 5 - NITROGEN, PERIOD 1, FAMILY 8 - HELIUM,

Unit 1 Vocabulary Review (Atomic Structure)

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