That I agree. So from materialist point of view what makes you you is configuration of atoms.
Yes, because our form in Thomatistic point of view is same. The problem is that this form or soul does not even have a personal identity attached to it, it is simply naked, so we lose everything upon death. This means that God has to recreate our body with the same configuration to give us the same identity and memory. This to me is nonsense since the existence of soul in this view does not offer anything over materialism.
A power of the human being is the use of a rational intellect. This is moving beyond patterns and pointers to actually grasping the concept (or form of a thing) in your mind. It’s how synapse activity, which is devoid of actual “aboutness” of anything in itself, can be brought to fruition into actual thought. We are, of course, working within the framework of things having formal causes and a realist approach to universals, but a materialist conception of the human mind could possibly explain our behavior, but it fails to explain any type of individuality to that behavior and our thoughts. This in no way denies the brain’s role in conscious activity and the influence it has on feelings and muscle control and such, and it is the means by which a human being has a causal relationship to the world, but a being without the power of a rational intellect, which cannot exist in any material sense, is devoid of any inherent meaningful content, thoughts, or will. It would be, in a sense, what those in philosophy of the mind call a zombie, given the appearance of being a thinking, willing, unified individual, but which in reality is not. The power of intellect is not corruptible, for it is not made of anything corruptible, and as the body dies, the intellect does not. And as a dog with no tail is still a dog, and as a dog with no tail or legs is still a dog, so is a human being still a human being, retaining it’s form, if all that remains is the intellect (there is disagreement among Thomism’s as to whether this intellect, which all consider eternal, retains the substantial form of a human being, with those who says it does being called survivalists and those who say it doesn’t being called corruptionists, but that’s another discussion). What is essential to being human is being a rational soul, and that remains. So there is something unique about each individual which remains to differentiate me from someone else, that of the experiences I possessed when I was differentiated by matter.
As to reconstitution in the resurrection, there’s debate among Christians in general about that, with some quite crazy examples used to illustrate difficulties. As stated, I’ll be made up of various different bits of matter throughout my life. It’s not constant. I’m just not made up as the same matter as anyone else at the same moment in time and space, and perhaps more importantly, it’s the matter that creates extension and localises me to particular points. Some Christians argue that at least a portion of the matter that makes me up during my life will be part of my resurrected body, but not that I’ll be made up of entirely the same matter.