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Carbo , silicon and Germanitum atomshave...

Carbo , silicon and Germanitum atomshave four valence electrons each . Their velence and conduction bands are separeated by energy nands gaps represented by ` (E_g)_C , (E_g)_(Si), (E_g)_(Ge)` repectively . Which relativon is correct ?

A

`(E_g)_C < (E_(g))_(Ge)`

B

`(E_g)_C < (E_(g))_(Si)`

C

`(E_g)_C =(E_(g))_(Si)`

D

`(E_g)_C > (E_(g))_(Si)`

Text Solution

Verified by Experts

The correct Answer is:
D
The enrgy gaps are in the order ` C gt Si gt Ge `.
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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))_(Si) and (E_(g))_(Ge) , respectively. Which one of the following relationship is true in their case?

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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 which of the following statement is true (a) (E_(g))_(Si)lt(E_(g))_(Ge)lt(E_(g))_(c ) (b) (E_(g))_(c )lt(E_(g))_(Gelt(E_(g))_(Si) (c ) (E_(g))_(c )gt(E_(g))_(Si)gt(E_(g))_(Ge) (d)(E_(g))_(c )=(E_(g))_(si)=(E_(g))_(Ge)

P BAHADUR-ATOMIC STRUCTURE-Exercise 3A
  1. A photosensitve metallic surface has work fuction hv0 If photons of ...

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  2. The work functions for metals A, B and ( C) are presepctively 1. 92 ...

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  3. Carbo , silicon and Germanitum atomshave four valence electrons each ....

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  4. The total enrgy of electron in the firdt state fo H-atom is -3 . 4 eV...

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  5. If lambdav, lambdax and lambdam represents the wavelength of visible...

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  6. Which of the following connot be obtained form the solution of Schrodi...

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  7. Which of the following does not characteristic X -rays ?

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  8. Which electronic level would allow the hydrogen atom to absorb a phot...

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  9. The mass fo 1 mole pghoton of wavelength 589 nm is :

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  10. Number of degenerate orbitals in a level of H-atom having En = (Rh)/9...

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  11. The orientiation of an atomic orbital is governed by :

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  12. The uncertaintuy invelved in the measurement fo velocity within a dist...

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  13. The speed of an electron having its wavelength being equal to speed ca...

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  14. The differnce between nth and (n+1) the Bohr radius of B atom is equa...

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  15. Fill up a sutiable figure in each set in respective choices for psi(3...

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  16. If the uncertainties in the measurement of position and momentum ...

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  17. Ratio of m^(th) wavelength of Lyman series in H-atom is equal to:

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  18. IE1 for (H) and De are 13.6 eV 1 and 24.6 eV respectively . Thus enr...

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  19. The circumfernce fo n^(th) orbit in H-atom can be expressed in tems fo...

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  20. Ration of m^(th) to n^(th) wavelength of Balmer series in H-atom is eq...

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