8G Mini Energy Unit 1 Review

Explain the difference between an atom and a molecule.

• One molecule is made of one atom.
• One molecule is always made of different particles.
• One molecule is made of more than one atom.
• One molecule is made of more than two atoms.

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Which of the models below represent a molecule? 

• A
• B
• C
• D

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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 carbon atoms are there in a methane molecule? 

• 0
• 1
• 4
• 5

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How many hydrogen atoms are there in a water molecule? 

• 0
• 1
• 2
• 3

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What is the total number of atoms in an ammonia (NH₃) molecule?

• 1
• 2
• 3
• 4

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Carbon dioxide (CO₂) contains how many atoms of oxygen?

• 0
• 1
• 2
• 3

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How many hydrogen atoms are in a molecule of glucose/sugar (C₆H₁₂O₆)?

• 6
• 12
• 18
• 24

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The repeating structure of table salt is in the shape of a

• pyramid
• snowflake
• hexagon
• cube

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