semi-conductor diode is constructed by placing an n-type
semi-conductor together with a p-type
semi-conductor. When the n and p sides are first brought
together, electrons in the [1. (A) valence, (B) condition,
(C) heavy metal] band of the [2. (A) n, (B)
p] side fall into the holes in the [3. (A)
valence, (B) condition, (C) heavy metal] band of the
[4. (A) n (B) p] side, creating a depletion
zone (a region of [5. (A) increased, (B) decreased, (C)
unchanged]...