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Unformatted text preview: Neutronsmost massiveNUCLEUS Protonmiddle massiveNUCLEUS Electronsleast massiveOUTSIDE OF NUCLEUS Cations: Positive IONS o Lose Electrons Anions: negative IONS o Gain Electrons Properties and Changes in Matter Extensive Propertiesdepend on the amount of matter that is present Intensive Propertiesdo not depend on the amount of matter present Attractive Forces Solidsgreatest attractive forces Liquidcan slide past each other Gasesattractive forces are the lowest Symbols Atomic # = # protons in nucleus Atomic Mass Atomic # = # of Neutrons Atomic Mass = Protons + Neutrons # Protons = # Electrons Periodic Table Vertical ColumnsGROUPS Horizontal RowsPERIODS Group 17HALOGENmost reactive non metals Group 1ALKALIreactive metals Noble Gases Elements in Group 18 (Gases at room temperature) Un-reactive Stable...
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