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Transcript
8U2 - 5(D) recognize that chemical formulas are used to identify substances and determine the number of atoms of each element in chemical formulas containing subscripts; A way of describing the number of atoms Chemical formula that makes up one molecule of a compound Chemical Formula a representation of a substance in which the elements are represented by their symbols and subscripts represent the number of each element Chemistry The study of properties of matter and how matter changes Subscript the number written below and to the right of an element in a chemical formula; represents the number of atoms of an element present in a chemical formula This molecule contains 2 sodium atoms, 1 atom of Sulfur, and 4 oxygen atoms. There are 7 atoms total in this molecule. Subscript • • Finding the Number of Elements in aChemical Formula Finding the Number of Atoms in a Chemical Formula count the capital letters count the capital letters and numbers Methane contains 2 elements and 5 atoms. Oxygen is a diatomic molecule. One molecule contains one element and 2 atoms. Carbon dioxide contains 2 elements and 3 atoms. Water contains 2 elements and 3 atoms.