If temperature of gallium arsenide is increased then its conductivity will___________________?
Correct answer: B. increase
- A. decrease
- B. increase
- C. remains constant
- D. first decreases then increases
Explanation
Gallium arsenide is a semiconductor, and increasing temperature supplies more energy for electrons to cross the band gap into the conduction band. Its conductivity therefore increases; students may choose a by incorrectly applying the trend for metallic conductors, whose resistance usually increases with temperature.
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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