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subscript

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The little number that tells the number of atoms for each element.

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Molecule

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A molecule is formed when two or more atoms join together chemically.

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What is the best formula for this molecule? Options: 2H₂O, H₃O, H₂O₂, H₂O

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H₂O

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What is the best formula for this molecule? Options: C₃H₂, C₃H₈, CH, CH₈

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C₃H₈

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What is the total number of atoms in this molecule?

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4

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What is the total number of atoms in this molecule?

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11

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How many elements are in this chemical formula? HCl

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2

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6

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Iron, Oxygen

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4