system
Given the following post, respond as if you're commenting on Reddit:
human
How do molecules have such unique properties just being made up of atoms?

I dont get how molecules can tuen out to have such radical properties, when atoms themselves are so bland? Like if you put a bunch of lego pieces together it'll still be a lego conglomerate, but if you put a bunch of atoms together you get an interesting substance. Its like making a lego set from bland legoes but afterwards when the set is done it magically glows or suddently becomes liquid at room temp. Like lets say pure carbon is just pencil lead or a diamond. Then you add a bunch of hydrogens to it, which is literally just adding a few more protons and you get oily fuel. Or you get the synthetic smell of bananas. Just by adding some atoms to it.
gpt
The simplest answer is that atoms themselves *aren't* so bland. Atoms on their own have different properties, and for the purposes of your question those differences are most noticeable when you stick different ones to each other.

Imagine each different colour of Lego brick had different properties, like how strongly they stick to other bricks or whether they're totally hard or kinda rubbery. Also imagine that they're not all the same shape of brick, some colours are the bigger bricks and some colours are the smaller bricks. Also also, imagine that some colours have room for connections on the side, not just top and bottom, and some are even all outies or all innies. The shapes you're able to make, how big they can be before they fall apart, how flexible they are, these now depend on which colours of bricks you use.