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Version A Name ________________________ Date ________________ 4C: TEST: ELEMENTS COMPOUNDS and MIXTURES ­Part 1 1. Which of the following can be broken down by physical means (that is, a chemical reaction is
not necessary to separate its parts)? (0.69 points)
A. elements
B. compounds
C. mixtures
D. atoms
2. A substance contains only one type of atom. It must be an (a)….. (0.69 points)
A. Element
B. Compound
C. Mixture
D. Atom
3. Which diagram above represents a colloid? (0.69 points)
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A
B
C
D
E
F
G
H
4. Which of the substances shown is an example of a molecule? (0.69 points)
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A
B
C
D. All of the above are molecules
5. Which of the following describes the formula shown? (0.69 points)
A. Diatomic element
B. Compound
C. Atom
D. Mixture
6. Which of the following describes the substance below? (0.69 points)
A. An element
B. a compound
C. a mixture
D. an atom
7. Which of the following is a mixture of a triatomic compound and a monatomic element?
(0.69 points)
A
B
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C
D
8. The smallest particle of a substance or chemical which maintains the properties of substance
or chemical (0.69 points)
A. atoms
B. compounds
C. mixtures
D. molecule
9. Which of the following represents a group of atoms bonded together? (0.69 points)
A. molecules
B. mixtures
C. both molecules and mixtures
D. neither molecules nor mixtures
10. How many different ELEMENTS are illustrated in the picture? (1 point)
_______________ 11. How many total number of molecules are illustrated in the diagram? (1 point)
_______________ 12. How many different compounds are illustrated in the diagram? (1 point)
_______________ 13. Which of the following statements about the diagram is correct? (1 point)
A. It is a mixture ­ the elements are different
B. It is a mixture ­ there are compounds
C. It is a pure substance ­ the atoms are all the same
D. It is a pure substance ­ all of the molecules are the same
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14. Which of the following is an example of a container that is filled with a pure substance rather
than with a mixture? (0.69 points)
A. a tire filled with air
B. a balloon filled with helium
C. a jar filled with salt water
a glass filled with chocolate milk
15. Which diagram below illustrates a pure substance consisting of triatomic compounds?
(0.69 points)
A
B
C
D
E
F
G
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H
16. Which of the following substances can be separated into several elements? (0.69 points)
A. Nitrogen
B. Zinc
C. Air
D. Aluminum
17. Which of the following MUST consist of two or more elements? (0.69 points)
A. atom
B. molecule
C. compound
18. Choose one answer A,B,C,D,or E and then any other that apply (F,G, F and G, or neither F or
G) (0.69 points)
A. It is an element
B. It is a compound
C. It is a mixture of elements
D. It is a mixture of compounds
E. It is a mixture of elements and compounds
F. It is a pure substance
G. There is/are diatomic molecules
19. Choose one answer A,B,C,D,or E and then any other that apply (F,G, F and G, or neither F or
G) (0.69 points)
A. It is an element
B. It is a compound
C. It is a mixture of elements
D. It is a mixture of compounds
E. It is a mixture of elements and compounds
F. It is a pure substance
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G. There is/are diatomic molecules
20. Is Pure Water an element, compound, or mixture? (0.69 points)
A. element
B. Compound
C. Mixture
21. Is oxygen an element, compound, or mixture? (0.69 points)
A. element
B. Compound
C. Mixture
22. Is the atmosphere (the air) an element, compound, or mixture? (0.69 points)
A. Element
B. Compound
C. Mixture
23. Is soda (like coca­cola, sprite) an element, compound, or mixture? (0.69 points)
A. Element
B. Compound
C. Mixture
24. Is salt an element, compound, or mixture? (0.69 points)
A. element
B. compound
C. mixture
25. Which of the following is most likely to settle out (separate) if left for a long period of time?
(0.69 points)
A. Solution
B. Colloid
C. Suspension
26. Is jello a colloid, solution, or suspension? (0.69 points)
A. colloid
B. solution
C. suspension
27. Is brass a solution or suspension? (0.69 points)
A. solution
B. suspension
28. Is chex mix a colloid, a solution, or a suspension? (0.69 points)
A. colloid
B. solution
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C. suspension
29. A sealed flask contains all 3 substances shown below. Which statement BEST and MOST
ACCURATELY describes the contents of the flask? (0.69 points)
A. a mixture of compounds
B. a pure substance of compounds
C. a mixture of molecules
D. a pure substance of molecules
E. a mixture of atoms
F. a pure substance of atoms
30. THREE sealed flasks, labeled A, B, and C contain the 3 substances shown below. Each flask contains one of the substances ­ flask A contains substance A, flask B contains
substance B, flask C contains substance C.
Which statement BEST and MOST ACCURATELY describes the contents of EACH flask?
(0.69 points)
A. a mixture of compounds
B. a pure substance of compounds
C. a mixture of molecules
D. a pure substance of molecules
E. a mixture of atoms
F. a pure substance of atoms
31. Which of the images shown could represent Methane, CH4 ? (0.69 points)
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A
B
C
D
32. Which of the images above could be Carbon Dioxide, CO2? (Remember that carbon forms 4
bonds)
(0.69 points)
A
B
C
D
33. Which of the following statements about molecules and bonding is true? THERE MAY BE MORE
THAN ONE CORRECT ANSWER ­ SELECT ALL THAT APPLY! (0.69 points)
A. Molecules must contain atoms of the same element
B. Molecules form because some elements "need" more electrons
C. Molecules form when atoms share electrons
D. Atoms must share more than one electron
E. Atoms do NOT have to share more than one electron, but some elements can
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Version A Answer Sheet
4C: TEST: ELEMENTS COMPOUNDS and MIXTURES ­Part 1 1. C. mixtures
2. A. Element
3. A
4. D. All of the above are molecules
5. A. Diatomic element
6. B. a compound
7. B
8. D. molecule
9. A. molecules
10. 2, two
11. 4, four
12. 1, one
13. D. It is a pure substance ­ all of the molecules are the same
14. B. a balloon filled with helium
15. F
16. C. Air
17. C. compound
18. B. It is a compound, F. It is a pure substance
19. C. It is a mixture of elements
20. B. Compound
21. A. element
22. C. Mixture
23. C. Mixture
24. B. compound
25. C. Suspension
26. A. colloid
27. A. solution
28. C. suspension
29. C. a mixture of molecules
30. D. a pure substance of molecules
31. A
32. B
33. B. Molecules form because some elements "need" more electrons, C. Molecules form when
atoms share electrons, E. Atoms do NOT have to share more than one electron, but some
elements can
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