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...Chemistry hs ps matter and its interactions use the periodic table as a model to predict relative properties of elements based on patterns electrons in outermost energy level atoms clarification statement examples that could be predicted from include reactivity metals types bonds formed numbers reactions with oxygen assessment boundary is limited main group does not quantitative understanding ionization beyond trends evidence statements science engineering practices disciplinary core ideas cross cutting concepts developing using models structure modeling builds k progresses each atom has charged substructure consisting nucleus different may observed at scales synthesizing show which made protons neutrons surrounded by system studied can provide for relationships among variables between systems their causality explanations phenomena components natural designed worlds or orders horizontally number s places those similar chemical columns repeating this reflect outer electron states connec...