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Melissa Bradley, Ed.S. (Education Leadership Specialist)

TEKS Reflection/Matter and Energy_Chemical Formulas, Reactions, and Equations

Grades: 8th Grade
Subjects: Science

Student Instructions

Using the information provided from the 9 weeks assessments. Use pencil and label to record progress. Common note mistakes are: • Not recognizing that there is only one atom present if there is no subscript • Not knowing that some elements are represented by capital and lowercase letter • Not adding atoms of the same element if they are in the same compound (e.g., HOH has two hydrogen atoms and one oxygen atom) • Making multiplication errors to distribute the subscript after a parenthesis • Not adding atoms when a chemical formula has the same element in two places • Misinterpreting properties that are not the result of a new substance being formed as evidence of a chemical reaction (e.g., color change because of added color, temperature change because of a hot plate, presence of gas in reactants) • Thinking that the gas produced by boiling a substance is evidence of a chemical change • Confusing a change of state and a chemical change

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