| Subject | 
has nuclear spin | 
has decay mode | 
is a kind of | 
has number of neutron | 
has definition | 
has number of nucleon | 
has half life | 
has nuclear magnetic moment | 
is an instance of | 
has nuclear quadrupole moment | 
has symbol | 
has atomic mass | 
has natural abundance | 
| potassium |   |   | accumulating oceanic element |   | soft white metal which is silvery when first cut but oxidizes rapidly in air |   |   |   |   |   | K |   |   | 
| potassium 40 | I = 4- h/2π | γ |   | 21 |   | 40 | 1.25 × 109 years | μ = -1.298009 nuclear magnetons with diamagnetic correction | potassium | -0.0749 × 10-28 m2 | 40K | 39.963999 | 0.0117 % |