Semiconductors: Metallic bonding is due to
A. the sharing of electrons by all atoms.
B. the transfer of electrons between atoms.
C. unequal charge distributions around neutral molecules.
D. atoms bonding to hydrogen molecules.
Answer: A
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An atom is ionized if one of its electrons jumps to a higher energy level in the atom
Indicate whether the statement is true or false
Suppose that Democritus were alive today, and that he saw a bright red fire truck. He would say that
A) the color of the fire truck, and the atoms of which it is made, are equally real. B) the color of the fire truck is more real than the atoms of which the truck is made. C) the color of the fire truck is less real than the atoms of which it is made. D) neither the color, nor the truck, nor the atoms are real.
This diagram summarizes modern particle classification. Where do protons, neutrons, and electrons, the particles that make atoms, fit in?
A) Protons and neutrons are made of quarks, while electrons are leptons. B) Protons and neutrons are quarks, while electrons are leptons. C) Protons and neutrons are fermions, while electrons are bosons. D) Protons, neutrons, and electrons have a separate classification scheme; they are made neither of fermions nor bosons.
The changing of a vapor into a liquid is called
A) condensation. B) evaporation. C) dew point. D) saturation point.