Those are some awesome questions to marinate on. I think it all has to do with each individual's view of the world. I cant really speak for the bigger questions of determinism because I simply do not know. You have a good point with the action and reaction with atoms. My personal take is that some things can be predicted with 99.9% accuracy like the sun will rise tomorrow, but predicting other causes may be like a roulette table. I don't think we can guarantee it but there's a good chance of raising the chance. We can do our best to determine things for ourselves. It reminds me of an old Stoic saying "The man who has anticipated the coming of troubles takes away their power when they arrive." - Seneca. So thats the best I got friend, cheers!