nonmetals
noble gases
metalloids
halogens
alkaline earth metals
post-transition metals
alkali metals
transition metals
lanthanoids
actinoids
138Ba | 137.905247 | 71.70% | |
137Ba | 136.905827 | 11.23% | |
136Ba | 135.904576 | 7.85% | |
135Ba | 134.905688 | 6.59% | |
134Ba | 133.904508 | 2.42% | |
130Ba | 129.90632 | 0.11% | |
132Ba | 131.905061 | 0.10% |
The Greek 'barys', meaning heavy