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Semiconductor Materials 8

8. Germanium and silicon are :

(a) trivalent
(b) tetravalent
(c) pentavalent
(d) covalent

Answer : (b)

Explanation :
Silicon : The atomic number of silicon is 14. Silicon atom has four valence elements i.e., it is a tetravalent element.
Germanium : The atomic numbers of germanium is 32. It has four valence electrons i.e., it is tetravalent element.

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