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Electronics and Communication Engineering - Electronic Devices and Circuits - Discussion

Discussion Forum : Electronic Devices and Circuits - Section 3 (Q.No. 9)
Electronic Devices and Circuits
9.
Which of the following elements act as donor impurities?
  1. Gold
  2. Phosphorus
  3. Boron
  4. Antimony
  5. Arsenic
  6. Indium
Select the answer using the following codes :
1, 2 and 3
1, 2, 4, and 6
3, 4, 5 and 6
2, 4 and 5
Answer: Option
Explanation:

Only antimony, arsenic and phosphorous are pentavalent.

Discussion:
2 comments Page 1 of 1.
Rohan said:   1 decade ago
Gold has only 1 valence electron.
Pnks said:   1 decade ago
What about Gold?
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