Atoms Compounds and Molecules

Elements are made of 

• many types of atoms 
• the periodic table
• one type of atom 
• molecules 

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All matter is made of 

• energy 
• atoms 
• electrons 
• compounds 

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Two or more atoms chemically bonded together are called a

• atom
• element
• molecule
• mixture

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How many hydrogen atoms are there in a water molecule? 

• 0
• 1
• 2
• 3

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2. An Element is ...

• A. made up of more than one atom that can be broken down into simpler substances.

• B. made up of more than one atom that cannot be broken down into simpler substances.

• C. made up of only one atom.

• D. made up of only one atom that cannot be broken down into simpler substances by physical means.

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3. A Mixture is ...

• A. a composition of one substance that is chemically combined and not capable of being separated.

• B. the amount of 3-dimensional space occupied by an object.

• C. two or more substances that are not chemically combined with each other and are capable of being separated.

• D. the changing of a liquid to a gas when heat energy is applied.

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A molecule is

• two or more atoms bonded together
• one type of atom
• smaller than an atom 
• an element

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What is a compound?

• A pure substance made up of only one type of atom

• A molecule made of 2 or more different elements

• An element

• A single atom

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The picture represents

• a compound

• an element and a molecule

• a compound an a molecule

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Which of the following is true?

• All molecules are compounds.

• All compounds are molecules.

• All elements are molecules.

• All molecules are elements.