Input interpretation
![alkaline earth metal ions | total number of protons](../image_source/b39cf0b0935fe6d1b3308c83633b725f.png)
alkaline earth metal ions | total number of protons
Total number of protons rankings
![1 | beryllium cation | 4 2 | magnesium cation | 12 3 | calcium cation | 20 4 | strontium cation | 38 5 | barium cation | 56 6 | radium cation | 88](../image_source/9e5f409d304fa037695a7094241ab79f.png)
1 | beryllium cation | 4 2 | magnesium cation | 12 3 | calcium cation | 20 4 | strontium cation | 38 5 | barium cation | 56 6 | radium cation | 88