how to write a seventh leading tone chord for 4 part harmony for strings?. Thank you
You can do this in many different ways. The simplest way is to put the root in the cello, the third in the viola, the fifth in second violin, and then double the root in the first violin. You could also put the seventh (which would be the sixth note of the scale) in the first violin part.
So much depends on what is going on around the chord that it's difficult to answer the question with any degree of precision.