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? In equation form 3 parts per trillion is written as 3/10^12 A) 3 x 10-12 B) 3 x 106 C) 3×10-9 D) 3 x 109
2 answers:
Answer:
A. 3 x 10-12
Explanation:
Generally, the parts-per notation is used to represent very small concentration without any specific unit.
Parts per million is notated as
Parts per billion is notated as
Parts per trillion is notated as
Hence, 3 parts per trillion will be written as 3 x
The correct option is A.
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