Atoms 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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What are the 3 particles that make-up the atom?

• protons, neutrons, and isotopes
• neutrons, isotopes, and electrons
• positives, negatives, and electrons
• protons, neutrons, and electrons

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NGSS.MS-PS1-1

What is the basic unit of matter and is the smallest particle of an element?

• Atoms
• Elements
• Compounds
• Molecules

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How many atoms are there in a molecule?

• no atoms
• 1 or more atoms
• 2 to thousands of atoms
• exactly 18 atoms

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

• 0
• 1
• 2
• 3

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What type of molecule does this picture show?

• hydrogen peroxide
• water
• carbon monoxide
• sugar

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NGSS.MS-PS1-1

When there is no subscript after an element's symbol, it means there are how many atoms of that element?

• 0
• 1
• 2
• unknown

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