If the electronic structure of a solid substance consists of a valence band that is completely filled with electrons and there is a large energy gap to the next set of orbitals, then this substance will be a(n) _ .
A) semiconductor
B) conductor
C) alloy
D) nonmetal
E) insulator
Correct Answer:
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Q50: Which of the following equations represents the
Q51: The Hall process is
A) the pyrometallurgic process
Q52: The molecular- orbital model for Ge shows
Q53: Which statement about steel is false?
A) It
Q54: Which mineral contains aluminum?
A) malachite
B) bauxite
C) cinnabar
D)
Q56: Which one of the following metallic elements
Q57: Hydrometallurgy is
A) the use of aqueous solutions
Q58: Smelting is
A) thermal decomposition of an ore
Q59: Which property of metals cannot be explained
Q60: Sodium metal cannot be produced by electrolysis
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