I Am A Chemical

Personified chemical children are kept in a periodic table shaped apartment complex and a few surrounding facilities for the entirety of their living memory. Not having any reference points but each other, not knowing any world outside the facilities. They were brought up as infants, educated by faceless volunteers with masks and a full suit, and referred to with no name but an element they were assigned at birth. Nobody among themselves had thought to question it, but when Fluorine gets temporarily put in the noble gases' tower for misbehaving (they are always the safest people to throw misbehaving kids with), she looks over to the fence beyond the border and sees.

[Note: This has nothing to do with my atomblood world, these are element embodiments, not atombloods.]