For an element cell with a height of 72 (arbitrary unit) its width would be 60 and going down the stuff inside the cell would be like this:
- Gap, height 3
- Element name, height 7
- Gap, height 5
- Atomic number, height 8
- Gap, height 6
- Atomic symbol, height 21
- Gap, height 9
- Atomic mass, height 7
- Gap, height 6
I might reduce the height of atomic mass and element name by one for top and bottom borders with a height of 1