What should be my Gym workout routine?

Hi... I want to gain muscle mass....the workout routine I follow is...
Mon-biceps, shoulder, abs
Tue- triceps, shoulder, abs
wed- chest, shoulder, abs
thurs to sat- same as mon to wed
sunday-off
is this routine good or should I change it??
I am not a beginner.... I m 21yrs,,...male
2 answers 2