Chemical Formulas

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What is a compound?

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A compound is a substance formed when two or more different elements are chemically bonded together. Example: CO₂ (carbon dioxide) is a compound made of carbon and oxygen.

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What is the chemical formula for three hydrogen (H), one sulfur (S), and four oxygen (O)?

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H₃SO₄ (sulfuric acid) is the correct formula for three hydrogen, one sulfur, and four oxygen.

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What are metals?

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Metals are elements that are typically shiny, good conductors of heat and electricity, and malleable. They are found on the left side of the periodic table.

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How many atoms are in H₂SO₄?

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There are 7 atoms in H₂SO₄: 2 hydrogen (H), 1 sulfur (S), and 4 oxygen (O).

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What are metalloids?

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Metalloids are elements that have properties of both metals and nonmetals. They are often semiconductors.

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What is the difference between an element and a compound?

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An element is a pure substance that cannot be broken down into simpler substances, while a compound is made up of two or more elements chemically combined.

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What is the chemical formula for water?

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The chemical formula for water is H₂O, which consists of two hydrogen atoms and one oxygen atom.

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What are nonmetals?

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Nonmetals are elements that are typically poor conductors of heat and electricity and are found on the right side of the periodic table.

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What is a chemical formula?

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A chemical formula is a way of expressing information about the proportions of atoms that constitute a particular chemical compound.

Front

What is the significance of subscripts in a chemical formula?

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Subscripts indicate the number of atoms of each element in a compound. For example, in H₂O, the '2' indicates there are two hydrogen atoms.