Elements and Compounds 7th Grade

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What is a chemical symbol?

Back

A chemical symbol is one or two letters that represent an element.

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6

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4

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Iron, Oxygen

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What is a compound?

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A compound is a substance made up of atoms of two or more different elements connected together.

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What is an element?

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An element is a pure substance that cannot be broken down into simpler substances by chemical means.

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What is a molecule?

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A molecule is a group of two or more atoms bonded together.

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What is the difference between an element and a compound?

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An element is a single type of atom, while a compound is made of two or more different types of atoms.

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What does the subscript in a chemical formula indicate?

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The subscript indicates the number of atoms of the element in the molecule.

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What is the chemical formula for water?

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