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Unit 3 Test Review
Test Description: Elements
Instructions: Answer all questions to get your test result.
1) Which of the following is the chemical symbol for chlorine?
A
Cl
B
Ch
C
Ce
D
C
2) The chemical symbol Ca represents....
A
carbon
B
cesium
C
chlorine
D
calcium
3) Which of the following substances is an element?
A
CO2
B
Co
C
KF
D
NaS
4) Which of the following are characteristics of an element?
A
Made from a mixture and make up matter on Earth.
B
A pure substance, represented by a symbol, and make up matter on Earth
C
Made from a mixture and represented by a symbol.
D
A pure substance and make up matter on Earth
5) Which of the following represents an element?
A
Ag, Db, and Xe
B
CO, HI, and CN-
C
Ag, HI, Db, and Xe
D
CO and CN-
6) Which of the following represents an element?
A
Cr and Cs
B
Cr, KF, and Cs
C
KF, H2SO4, Al2O3, and CaO
D
KF and CaO
7) Which of the following correctly represents an element?
A
Salt-NaCl
B
Copper-Cu
C
Water-H2O
D
Carbon monoxide-CO
8) Which elements comprise the largest portion of the atmosphere?
A
Hydrogen, oxygen, sodium, and chlorine in the form of water (H2O) and salt (NaCl)
B
Nitrogen and oxygen in the forms of nitrogen (N2) and oxygen (O2)
C
Silicon and oxygen in the form of silicon dioxide (SiO2)
D
Carbon and oxygen in the forms of oxygen (O2) and carbon dioxide (CO2)
9) Organisms are made of elements that form living matter. Which elements comprise the largest portion of living matter?
A
Oxygen, carbon, and silicon
B
Hydrogen, carbon, oxygen, and nitrogen
C
Chlorine, sodium, and oxygen
D
Sulfur, calcium, carbon, and hydrogen
10) Which group of elements comprises the largest portion of oceans?
A
Group A-Oxygen, Hydrogen, Sodium, and Chlorine
B
Group B-Nitrogen, Oxygen, Argon, and Carbon Dioxide
C
Group C-Nitrogen, Oxygen, Carbon, and Hydrogen
D
Group D-Oxygen, Silicon, Aluminum, and Iron
*select an answer for all questions
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