1. Suppose there is an atom of oxygen, containing eight protons and eight neutrons in the nucleus, and four neutrons added to the nucleus. The resulting atomic weight is about: а. 20 b. 16 с. 18 d. 24 2. Assume the valence electron is removed from a copper atom. The net charge of the atom becomes а. +1 b. О с. -1 d. +4 3. At room temperature, the current in an intrinsic semiconductor is due to а. Holes b. Electrons c. Ions d. Holes and Electrons

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1. Suppose there is an atom of oxygen, containing eight protons and eight neutrons in
the nucleus, and four neutrons added to the nucleus. The resulting atomic weight is
about:
а. 20
b. 16
с. 18
d. 24
2. Assume the valence electron is removed from a copper atom. The net charge of the
atom becomes
а. +1
b. 0
С. -1
d. +4
3. At room temperature, the current in an intrinsic semiconductor is due to
a. Holes
b. Electrons
c. Ions
d. Holes and Electrons
Transcribed Image Text:1. Suppose there is an atom of oxygen, containing eight protons and eight neutrons in the nucleus, and four neutrons added to the nucleus. The resulting atomic weight is about: а. 20 b. 16 с. 18 d. 24 2. Assume the valence electron is removed from a copper atom. The net charge of the atom becomes а. +1 b. 0 С. -1 d. +4 3. At room temperature, the current in an intrinsic semiconductor is due to a. Holes b. Electrons c. Ions d. Holes and Electrons
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