14.3 Carbon, silicon and germanium have four valence electrons each. These are…

CHEMISTRY · Single correct · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures

Problem

14.3 Carbon, silicon and germanium have four valence electrons each. These are characterised by valence and conduction bands separated by energy band gap respectively equal to

\left(E_{\mathrm{g}}\right)_{\mathrm{C}},\left(E_{\mathrm{g}}\right)_{\mathrm{Si}}

and

\left(E_{\mathrm{g}}\right)_{\mathrm{Ge}}

. Which of the following statements is true? (a)

\left(E_{g}\right)_{\mathrm{Si}}<\left(E_{g}\right)_{\mathrm{Ge}}<\left(E_{g}\right)_{\mathrm{C}}

(b)

\left(E_{g}\right)_{\mathrm{C}}<\left(E_{g}\right)_{\mathrm{Ge}}>\left(E_{g}\right)_{\mathrm{Si}}

(c)

\left(E_{g}\right)_{\mathrm{C}}>\left(E_{g}\right)_{\mathrm{Si}}>\left(E_{g}\right)_{\mathrm{Ge}}

(d)

\left(E_{g}\right)_{\mathrm{C}}=\left(E_{g}\right)_{\mathrm{Si}}=\left(E_{g}\right)_{\mathrm{Ge}}

Related theory

States of Matter

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