Carbon, silicon and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by (Eg)C,(Eg)S i and (Eg)G e respectively. Which one of the following relationships is true in their case?

Question

Carbon, silicon and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by (Eg)C,(Eg)S i and (Eg)G e respectively. Which one of the following relationships is true in their case? (A) (Eg)C > (Eg)Si (B) (Eg)C = (Eg)Si (C) (Eg)C < (Eg)Si (D) (Eg)C ≠ (Eg)Si

Tardigrade Admin · Accepted Answer

Carbon, silicon and germanium are semiconductors.

(E_{g})_{C} = 5.2 e V

(E_{g})_{S i} = 1.21 e V

(E_{g})_{S i} = 1.21 e V

Thus,

(E_{g})_{S i} = 1.21 e V

and

(E_{g})_{C} > E_{g})_{G e}

Note: Elements carbon, silicon and germanium are found in

I V

A group of periodic table.

Q. Carbon, silicon and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by $(E_{g})_{C}, (E_{g})_{S i}$ and $(E_{g})_{G e}$ respectively. Which one of the following relationships is true in their case?

$(E_{g})_{C} > (E_{g})_{S i}$

$(E_{g})_{C} = (E_{g})_{S i}$

$(E_{g})_{C} < (E_{g})_{S i}$

$(E_{g})_{C} \neq = (E_{g})_{S i}$

Carbon, silicon and germanium are semiconductors. $(E_{g})_{C} = 5.2 e V$
$(E_{g})_{S i} = 1.21 e V$
$(E_{g})_{S i} = 1.21 e V$
Thus, $(E_{g})_{S i} = 1.21 e V$
and $(E_{g})_{C} > E_{g})_{G e}$
Note: Elements carbon, silicon and germanium are found in $I V$ A group of periodic table.

Q. Carbon, silicon and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by (Eg​)C​,(Eg​)Si​ and (Eg​)Ge​ respectively. Which one of the following relationships is true in their case?

(Eg​)C​>(Eg​)Si​

(Eg​)C​=(Eg​)Si​

(Eg​)C​<(Eg​)Si​

(Eg​)C​=(Eg​)Si​