Why are chemical compounds different from mixtures? - Because a compound is a pure substance., What is a subscript? - The number of atoms of each element that is present in the compound (H2O), Example of element - O, O2, Example of compound - KMnO4  or HCi, Example of molecule - KMnO4 or O2, What is a coefficient? - Tells the # of molecules in a chemical equation(3MgCl2) , The bonds between atoms in a molecule form as a result of what? - sharing or exchanging of valence electrons,

SJS Midterm Science Molecule Assessment

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