6.2.1 Atoms and Molecules

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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A single drop of water is made of approximately 1,670,000,000,000,000,000,000 molecules of water. When that same drop of water is heated it disappears. What happened to those molecules?

• The molecules are broken down to their smaller atoms hydrogen and oxygen and become part of the air.
• The molecules separate and become part of the air but remain water molecules.
• They are destroyed and no longer exist.
• They are turned into energy.

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Which of the models below represent a molecule? 

• A
• B
• C
• D

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Which of the models below represent an atom? 

• A
• B
• C
• D

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

• Gold
• Hydrogen
• Salt 
• Neon 

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

• Atoms
• Elements
• Compounds
• Molecules

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