@brainbomb - I'm confident you're trolling, but for what it's worth Christians teach that the same God works in and through old and new testaments. If you're interested in the history of the ways Christians (or others) have clarified the teaching of the Holy Trinity, I'm sure I could find resources so we can speak (agreeing or disagreeing) about the ideas intelligently and respectfully.
@kakarroto -
The rock-creating-lifting question itself, which IME is generally delivered by unkind atheists attempting to prove God illogical, really just demonstrates the finitude of our subjective perception of God's attributes (a finitude most rationalists tend to reject a priori). Though if you believe in the Incarnation as I do, you could say that God (Trinity, infinite, incorporeal) created a rock so big that God the Son (Jesus, self-limiting in the Incarnation) chose to not-be-able-to-lift.
Anyway, the rock-lifting question wasn't actually your question. You wanted to know if randomly-appearing elemental properties cause free will, so that God could run an experiment of sorts? Interesting! I'd say:
a) Just because WE can't tell where elemental properties will show up next... that doesn't mean that God doesn't know where they'll show up, or have power over when/where that is. Omniscience is omniscience. Omnipotence is omnipotence. If we're going to think about God as having those attributes, we can't limit His abilities to our finite level of scientific understanding).
b) The question of free will vs. determinism is far from settled, so it may be a bit narrow minded for anyone to suggest that scientists or theologians have the matter settled.
c) If you're wondering if "free will" is the rock God made that's too big to lift, and randomly appearing elemental properties are the material cause of free will, then you have to determine to what extent He has limited his infinite power to let the experiment run. If He's determining the "random" appearance of elemental properties, then our materially-determined free-will really free at all. If He set the universe in order and then limited His participation for the sake of us beings living with independent wills within it, then the ordered pattern of elemental "randomess" isn't (yet?) apparent to us, but it might be some day. If that's the case though, He limited Himself for a purpose, rather than one attribute being overtaken by another. Ask me sometime how God can be infinitely just and merciful at the same time, because that's a better question.
Ultimately, the logical problem comes from proposing that infinite properties are or can be contradictory to one another. We've already had a thread about infinities this month, so yes, this thread is redundant.