Question

Carbon, silicon and germanium have four
valence electrons each. These are characterized
by valence and conduction bands separated by
energy band gap respectively equal to (E)
(E)si and (E)Ge Which of the following
statements is true ?
(a) (E)c = (E) = (E)Ge
(b) (E) > (E) > (E)Ge
(c) (E) <(E)Ge>(E)s
(d) (E)si <(Eg)e > (Eg)c
​

Answer 1

Answer:

For given elements, the energy band gap of carbon is the maximum and of germanium is the least.

Hence option C is correct.

Answer 2

Answer:

going down the group metallic character inc. therefore energy gap will dec.

therefore ,now u know !