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Unit 2 Review

Authored by Vanessa Rodriguez

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Unit 2 Review
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20 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

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1. The diagram above shows a block from the periodic table. The number six represents the...

A. atomic mass of the element carbon
B. atomic number of the element carbon
C. number of neutrons in the element carbon
D. number of valence electrons in the element carbon

2.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

2. Carol placed a lid over a pot of boiling water. After five minutes, she removed the lid and noticed water drops had formed all over the lid's inner surface. Which statement describes the change in the water vapor molecules as they changed to liquid?

A. Heat energy at the lid's surface increased.
B. The water molecules average speed decreased.
C. The attractive force between the water molecules decreased.
D. The water molecules average speed increased

3.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

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3. Using the Law of Conservation of Matter, determine the number of grams of iron sulfide (FeS) that will be produced in this reaction.

A. 24 grams
B. 32 grams
C. 56 grams
D. 88 grams

4.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

4. As you move across the periodic table from left to right within a period, the elements __________

A. become less stable.
B. become more reactive.
C. change from gases to solids.
D. change from metals to nonmetals.

5.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

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5. Look carefully at the pictures below. Which picture shows only a physical change in the wood?

A
B
C
D

6.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

6. Mary wants to find the density of a small stone. Which tools will she need?

A. A meter stick and a thermometer.
B. A thermometer and a balance.
C. A balance and a graduated cylinder.
D. A graduated cylinder and a meter stick

7.

MULTIPLE CHOICE QUESTION

30 sec • 5 pts

Media Image

7. If different kinds of atoms are represented by different colored dots, which picture below represents a mixture?

A
B
C
D

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