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A Sample of Silicon Rejected for Use in an Electronic

Question 1

Multiple Choice

A sample of silicon rejected for use in an electronic circuit has an impurity of boron at a level of 3 parts per trillion.What is the fraction of boron atoms in the silicon sample as written in scientific notation?


A) 3 x 10-9
B) 3 x 109
C) 3 x 10-12
D) 3 x 106

Correct Answer:

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