Question

Can you tell ?
Let a small
small quantity of
phosphorus be doped into pure
silicon.
Will the resulting material contain
the same number of total number of
electrons as the original pure silicon ?
Will the material be electrically
neutral or charged ?​

Answer 1

Answer:

Divide the total excess charge by the known charge of a single electron. Continuing with the example above, 2.4 x 10^-18 divided by 1.60 x 10^-19 is the same as 2.4 / 1.60 times 10^-18 / 10^-19. Note that 10^-18 / 10^-19 is the same as 10^-18 * 10^19, which equals 10. 2.4/1.6 = 1.5.