Period 21 element

Period 21 is the 21st period. It starts with Vermontium.

Char­gogg­a­gogg­man­chaugg­a­gogg­chau­bun­a­gung­a­maugg Lakide Series
Char­gogg­a­gogg­man­chaugg­a­gogg­chau­bun­a­gung­a­maugg Lakium - Terrarium

Alt33-100ide Series
Alt33-100ium - ?