Gloria is writing the chemical formula for a compound using its chemical name. She has just identified the names of the elements in the compound. What tool will she use next?

After identifying the elements, Gloria should use the prefix chart to determine how many atoms of each element are in the compound’s formula. Prefixes such as “di-” and “tri-” indicate the subscripts. The periodic table helps identify element symbols, but the prefix chart gives the atom counts.

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