53
126.904
95
lodine
[Kr] 4d105s 25p5
Halogens
243.061
Am
Americium
[Rn] 5f7 7s²
Actinides
126+243 = 369
"If you only knew
the magnificence
of the 3, 6 and 9,
then you would have
a key to the universe."
Nikola Tesla
@DRUE86