you can make chords out of any of these notes. but what is comonly done is called ading thirds
u take the first note, skip one take the second note skip one and takin the third note. then move one note up and do this again.
for example start on c
take c then skip d and get e and skipf and get g
so you have c e g these are the notes that make the c majour chord
start on d and do the same and you get d f a which is d minor
start on e and you get e g and b and you get e minor
start on f u get f a c which is f majour
start on g u get g b d which is g majour
start on a u get a c e which is a minor
start on b and you get b d f which is b minor b5 or b diminished
so you get the chords c majour, d minor, e minor, f majour, g majour, a minor, b diminished