20-Ca
 basic
 n-XS summary
 XS graphs
20-calcium
Naturally occuring isotopes:
Ca-40   ( 96.941% ) Ca-42   ( 0.647% ) Ca-43   ( 0.135% ) Ca-44   ( 2.086% ) Ca-46   ( 0.004% ) Ca-48   ( 0.187% , 6E+18 Y )
Isotopes:
Ca-34   Ca-35   Ca-36   Ca-37   Ca-38   Ca-39   Ca-41   Ca-45   Ca-47   Ca-49   Ca-50   Ca-51   Ca-52   Ca-53   Ca-54   Ca-55   Ca-56   Ca-57  
For information on elements, we recommend .