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Suppose a pure Si crystal has 5xx10^(28)...

Suppose a pure Si crystal has `5xx10^(28)` atoms `m^(-3)`. It is doped by 1 ppm concentration of pentavalent As. Calculate the number of electrons and holes. Given that `n_(i)=1.5xx10^(16)m^(-3)`.

A

`4.5xx10^(-9) m^(-3)`

B

`5.4xx10^(9) m^(-3)`

C

`4.5xx10^(9) m^(-3)`

D

`5.4xx10^(-9) m^(-3)`

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