Unit 2 Test Review- Matter SOL 6.5

To build any matter, you must begin with-

• molecules

• legos

• atoms

• protons

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This is a representation of Neon. Match each particle to it's name.

• Protons

• Red

• Neutrons

• Blue

• Electrons

• Yellow

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Based on this information, all neon atoms-

• are missing electrons

• have 10 protons

• have 10 neutrons

• are missing a nucleus

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Above are representations of two elements: chlorine (Cl) and aluminum (Al).

How many more protons does Chlorine have than aluminum? Type the number in the box.

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This model shows a helium atom. helium can also be represented by an He. This is called helium's chemical-

• message

• symbol

• abbreviation

• shorthand

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The following graphic shows some nitrogen and hydrogen atoms. Use the graphic to answer the question.

Which term best describes the red information on the left side of this equation?

• The compound

• Matter

• The reactants

• The products

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The following graphic shows some nitrogen and hydrogen atoms. Use the graphic to answer the question.

Which term best describes the blue information on the right side of this equation?

• The compound

• Matter

• The reactants

• The products

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Which chemical equation matches this model?

• 2H_{2 +} O₂ ---> 2H₂O

• H₂+O₂ ---> 2HO₄

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What does this modeled chemical equation demonstrate?

• After an experiment, new substances are the same as the ingredients. That's why they both have 4 iron atoms and 6 oxygen atoms.

• They made a mistake. That's why they both have 4 iron atoms and 6 oxygen atoms.

• The equation is written backwards. That's why they both have 4 iron atoms and 6 oxygen atoms.

• Matter is neither created or destroyed. That's why they both have 4 iron atoms and 6 oxygen atoms.

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The chemical formula for carbon dioxide is CO₂. C is the symbol for carbon and O is the symbol for oxygen. Which of the following is true about carbon dioxide? Choose 2 correct answers.

• There are 2 carbon atoms in carbon dioxide.

• There are 2 oxygen atoms in carbon dioxide.

• Carbon and oxygen are mixed but not bonded.

• Carbon and oxygen are chemically bonded.

• There are 2 more oxygen atoms than there are carbon atoms.

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