On this one, I'm going to have to go with the dumbell bench press. Start with 2 dumbells, in a seated postion and use your legs to kick them back as you go onto your back. Start with the dumbells down and your arms at a 90 degree angle. Bring your shoulder blades togethor and push the weight up, squeezing your chest muscles at the top, then bring them back down into the start position. For mass, pick a weight that allows you to do 8-10 reps before hitting failure.
This exercise has been regarded as the best chest builder for a long time. I like to alternate the dumbell and barbell bench press each chest workout. You can also pre-exhaust your pecs by starting your workout with pec deck flyes. This makes the burn you feel from the bench press even better! If you are a beginner I wouldn't start any workout by pre exhausting. Start with the compound exercises then finish it up with isolation exercises. Hope this helps! That is all for today but read tomorrow for Tricep building exercises!