Chemical Research Nine Weeks Exam
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Multiple Choice Exam
- 1.Which of the following contains only one type of atom?
- A.
A. compound
- B.
B. mixture
- C.
C. element
- D.
D. solution
- 2.Which of the following has a positive electric charge?
- A.
A. electron
- B.
B. proton
- C.
C. neutron
- D.
D. atom
- 3.In an atom, what forms a cloud around the nucleus?
- A.
A. electrons
- B.
B. protons
- C.
C. nertrons
- D.
D. positively charged particles
- 4.A carbon atom has a mass number of 12. how many protons and how many neutrons does it have?
- A.
D. 6,6
- B.
C. 12,12
- C.
B. 6,12
- D.
A. 12,6
- 5.On Earth, oxygen usually exists as which of the following?
- A.
A. solid
- B.
B. gas
- C.
C. liquid
- D.
D. plasma
- 6.Which of the following isotopes has seven neutrons?
- A.
A. boron-12
- B.
B. nitrogen-12
- C.
C. carbon-14
- D.
D. hydrogen-2
- 7.Which type of bond occurs because of the polar molecules of water?
- A.
A. ionic
- B.
B. covalent
- C.
C. metallic
- D.
D. hydrogen
- 8.Which of the following are electrically charged?
- A.
A. molecule
- B.
B. solution
- C.
C. isotope
- D.
D. ion
- 9.What type of property is the color of your clothes?
- A.
A. chemical property
- B.
B. physical property
- C.
C. isotopic property
- D.
D. molecular property
- 10.Which of the following is not a physical property of water?
- A.
A. transparent
- B.
B. colorless
- C.
C. higher density than ice
- D.
D. changes to hydrogen and oxygen when electricity passes through it
- 11.What changes when the mass of an object increases while volume stays the same?
- A.
A. color
- B.
B. length
- C.
C. density
- D.
D. height
- 12.What is the volume of a brick that is 20 cm long, 10 cm wide, and 3 cm high?
- A.
A. 33 cm3
- B.
B. 90 cm3
- C.
C. 600 cm 3
- D.
D. 1,200 cm 3
- 13.What is the density of an object with a mass of 50 g and a volume of 5 cm3?
- A.
A. 45 g/cm3
- B.
B. 55 g/cm3
- C.
C. 10 g/cm3
- D.
D. 250 g/cm3
- 14.What word best describes the type of materials that attract iron?
- A.
A. magnetic
- B.
B. chemical
- C.
C. mass
- D.
D. physical
- 15.Which is an example of a chemical property?
- A.
A. color
- B.
B. mass
- C.
C. density
- D.
D. ability to burn
- 16.Which is an example of a physical change?
- A.
A. metal rusting
- B.
B. silver tarnishing
- C.
C. water boiling
- D.
D. paper burning
- 17.
- A.
A. composition changes
- B.
B. composition stays the same
- C.
C. form stays the same
- D.
D. mass is lost
- 18.Which is an example of a chemical change?
- A.
A. water freezes
- B.
B. wood is carved
- C.
C. bread is baked
- D.
D. wire is bent
- 19.
- A.
A. change in color
- B.
B. change in shape
- C.
C. change in energy
- D.
D. change in odor
- 20.
- A.
A. density
- B.
B. shape
- C.
C. mass
- D.
D. arrangements of particles
- 21.What is the material through which mechanical waves travel?
- A.
A. charged particles
- B.
B. space
- C.
C. a vacuum
- D.
D. a medium
- 22.
- A.
A. speed
- B.
B. amplitude
- C.
C. energy
- D.
D. matter
- 23.What are the lowest points on a transverse wave called?
- A.
A. crests
- B.
B. troughs
- C.
C. compressions
- D.
D. rarefactions
- 24.What determines the pitch of a sound wave?
- A.
A. amplitude
- B.
B. frequency
- C.
C. speed
- D.
D. refraction
- 25.What is the distance between adjacent wave compressions?
- A.
A. one wavelength
- B.
B. 1 km
- C.
C. 1 m/s
- D.
D. 1 Hz
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