Question
A semiconductor has generally ______ valence electrons.
The correct answer is
4
Silicon (Si) is in Group 14 (formerly Group IV) of the periodic table. The outermost shell is the third shell, which has 2 + 2 = 4 electrons (3s^2 3p^2). The outermost shell is the fourth shell, which has 2 + 2 = 4 electrons (4s^2 4p^2).
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Important Questions from Semiconductors
The conductivity of silicon is $\sigma$=10 ( $\Omega$ cm)$^{-1}$ Determine the drift current density J, if an electric field of E=15v/cm is applied.
- Which metal is used in the making of microchips?
- Which of the following is a n-type semiconductor?
Which of the following materials is not a semiconductor ?
(a) ZnO
(b) Carbon nanotube
(c) SiO2
(d) CopperWhich is correct ?
Semi conductors have
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