Chapter 3 Test

The atomic number of an element is determined by the number of
A. neutrons B. protons C. electrons D. isotopes
The rows in the periodic table are called
A. groups B. periods C. nonmetals D. metals
Of the following, the group that contains the most reactive elements is
A. alkaline earth metals B. carbon family C. noble gases D. alkalai metals
Unstable nuclei that release fast-moving particles and energy are
A. isotopes B. alloys C. radioactive D. alpha particles
Unlike metals, solid nonmetals are
A. good conductors of heat and electric current B. dull and brittle C. malleable D. ductile
Elements that are gases at room temperature are likely to be classified as which of the following?
A. metals B. nonmetals C. metalloids D. semiconductors
Radioactive isotopes give off radiation that can be detected. This property makes them useful in which of the following ways?
A. as tracers in chemical reactions B. in detecting leaks in oil pipelines C. in diagnosing certain medical problems D. all of the above

Answer Key
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Chapter 3 Test (Answer Key)

The atomic number of an element is determined by the number of
A. neutrons B. protons C. electrons D. isotopes
The rows in the periodic table are called
A. groups B. periods C. nonmetals D. metals
Of the following, the group that contains the most reactive elements is
A. alkaline earth metals B. carbon family C. noble gases D. alkalai metals
Unstable nuclei that release fast-moving particles and energy are
A. isotopes B. alloys C. radioactive D. alpha particles
Unlike metals, solid nonmetals are
A. good conductors of heat and electric current B. dull and brittle C. malleable D. ductile
Elements that are gases at room temperature are likely to be classified as which of the following?
A. metals B. nonmetals C. metalloids D. semiconductors
Radioactive isotopes give off radiation that can be detected. This property makes them useful in which of the following ways?
A. as tracers in chemical reactions B. in detecting leaks in oil pipelines C. in diagnosing certain medical problems D. all of the above

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