Ch.2-3 Chemical Reactions TEST

Which of the diagrams below shows the repeating groups of atoms that make up the ending substances?

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The diagram below shows the repeating groups of atoms that make up two samples. Both samples are gases at room temperature. Will the other properties of the samples likely be the same or different?

• The other properties will likely be DIFFERENT because the repeating groups of atoms that make up the two samples have different numbers of atoms.
• The other properties will likely be the SAME because the repeating groups of atoms that make up the two samples have the SAME types of atoms.
• The other properties will likely be DIFFERENT because they are the SAME repeating group of atoms.
• The other properties will likely be the SAME because both samples have DIFFERENT repeating groups of atoms.

Which of the diagrams below shows the repeating groups of atoms that make up the samples the scientist mixed together? (This only shows one of the ending substances, it is not a balanced equation.)

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The diagram below shows the repeating groups of atoms that make up two samples. Both samples are gases at room temperature. Will the other properties of the samples likely be the same or different? (Examples of properties are smell, color, and the temperature at which a substance melts.)

• The other properties will likely be DIFFERENT because the repeating groups of atoms that make up the two samples have different numbers of atoms.
• The other properties will likely be the SAME because the repeating groups of atoms that make up the two samples have the SAME types of atoms.
• The other properties will likely be DIFFERENT because they are the SAME repeating group of atoms.
• The other properties will likely be the SAME because both samples have DIFFERENT repeating groups of atoms.

Which of the diagrams below shows the repeating groups of atoms that make up the ending substances?

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What is this model missing to make it correct?

• It should only have the oxygen and iron atoms in the before box.
• It should have 2 iron atoms in the before box instead of just one.

When the rust formed in the chemical reaction what would it be called?

• a reactant
• a product

Where did the oxygen atoms come from that formed the rust in Westfield?

• The air
• The fertilizer
• The pipe
• The water

What is the process by which atoms rearrange to form new substances?

• Chemical function
• Chemical reactant
• chemical formula
• Chemical reaction

Which of the following is defined as, " to change the order or position of something"?

• reactant
• product
• rearrange
• model