elements & compounds, atoms, chemical formulas

What is the main difference between an element and a compound?

• Elements are made of one type of atom, while compounds are made of two or more types of atoms.

• Elements are made of molecules, while compounds are made of atoms.

• Elements are always gases, while compounds are always solids.

• Elements cannot be found on the periodic table, while compounds can.

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TEKS.SCI.7.6A

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TEKS.SCI.7.6B

Which of the following is an example of an element?

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TEKS.SCI.7.6A

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TEKS.SCI.7.6B

Which of the following best describes a compound?

• A substance made of only one type of atom.

• A substance made of two or more types of atoms chemically bonded together.

• A mixture of different elements.

• A substance that cannot be broken down into simpler substances.

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TEKS.SCI.7.6A

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TEKS.SCI.7.6B

Which of the following is a compound?

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TEKS.SCI.7.6A

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TEKS.SCI.7.6B

What is the chemical symbol for the element oxygen?

• O

• Ox

• Oy

• Om

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TEKS.SCI.7.6A

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TEKS.SCI.7.6B