I'm very close to agreeing with you. I was a Determinist from the moment I understood what that means, but Quantum Mechanics has changed my belief slightly. I no longer believe that everything is determined in a 100% way. I do believe everything is "determined" in a probabilistic way. In other words, there is a 99.999% chance that action A will cause effect B, and so, we can assume that when we see action A, we will then observe effect B. But there is always the miniscule chance that due to quantum fluctuations, effect B' will actually result.
I guess what I'm saying is that:
Each element has its own unique properties and these characteristics do not deviate - H2 will always behave the same as all other H2 in the same conditions.
Is not completely true. The H2 could tunnel away and not react in the presence of something with which h2 wil "always" react.
This does not allow free will per se. It just gives human actions a probabilistic curve. A person, given a specific set of initial co nditions will react within the large part of the curve more often than not, and there may even be a reaction that is overwhelmingly expected, but some other reaction may still take place. The person reacting doesn't actually control those discrepancies any more than they control the probability curve, but it does allow the possibility of a person reacting contrary to "type."