A perfect crystal of silicon (fig) is deped with some elements as given in the options , which of these options shows n- type semicondutors ?

Options

A.
B.
C.
D.

Answer

A,C

Explanation

n- type semiconductor when group 15 elements are dopend into a perfect crystal it leads to foprmation of n- type semiconductor .
Here in (a) as (group 15, period 3) is doped to perfedct Si - crystal and in (c ) as (group 15, period 2) is doped to perfect Si-crystal .