Chemical Formulas: Counting Atoms and Molecules

Which of these items is made up of one or more molecules?

• Gold (Au)

• Hydrogen (H)

• Salt (NaCl)

• Neon (Ne)

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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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 are in 4H₂O?

• 6
• 8
• 2
• 4

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How many elements are in C₆H₁₂O₆?

• 1
• 2
• 3
• 4

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How many atoms are there TOTAL in:
H₂SO₄

• 6
• 5
• 7
• 3

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How many Sodium (Na) are in 6NaCl?

• 1
• 12
• 6