Unit 3 Test Review Question Preview (ID: 39067)


Elements. TEACHERS: click here for quick copy question ID numbers.

Which of the following is the chemical symbol for chlorine?
a) Ch
b) C
c) Cl
d) Ce

The chemical symbol Ca represents....
a) chlorine
b) cesium
c) carbon
d) calcium

Which of the following substances is an element?
a) CO2
b) NaS
c) Co
d) KF

Which of the following are characteristics of an element?
a) Made from a mixture and represented by a symbol.
b) Made from a mixture and make up matter on Earth.
c) A pure substance and make up matter on Earth
d) A pure substance, represented by a symbol, and make up matter on Earth

Which of the following represents an element?
a) Ag, HI, Db, and Xe
b) Ag, Db, and Xe
c) CO and CN-
d) CO, HI, and CN-

Which of the following represents an element?
a) KF, H2SO4, Al2O3, and CaO
b) KF and CaO
c) Cr and Cs
d) Cr, KF, and Cs

Which of the following correctly represents an element?
a) Water-H2O
b) Copper-Cu
c) Carbon monoxide-CO
d) Salt-NaCl

Which elements comprise the largest portion of the atmosphere?
a) Carbon and oxygen in the forms of oxygen (O2) and carbon dioxide (CO2)
b) Silicon and oxygen in the form of silicon dioxide (SiO2)
c) Hydrogen, oxygen, sodium, and chlorine in the form of water (H2O) and salt (NaCl)
d) Nitrogen and oxygen in the forms of nitrogen (N2) and oxygen (O2)

Organisms are made of elements that form living matter. Which elements comprise the largest portion of living matter?
a) Hydrogen, carbon, oxygen, and nitrogen
b) Chlorine, sodium, and oxygen
c) Oxygen, carbon, and silicon
d) Sulfur, calcium, carbon, and hydrogen

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

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