In painting, medium
a. the choice of liquid or gas that is added to a pigment.
b. the substance that is afdednto a color in order to application.
c. a media that consists of natural or synthetic mineral or plant substances.
d. the pigment that mixed with a binder of hot wax and fixed with a heat application.

the sculpture i am pretty sure you are talking about is the statue b. the david statue now lives in the galleria dell'accademia, florence, italy. it was made by ‎michelangelo.

a chromatic scale uses the twelve tones of the octave, while a regular scale only uses eight, or seven different notes (as the first note is played twice)