- If the elements have similar electron configurations , then the elements will be grouped into same family / group on the periodic table of elements
- Strontium, barium, and radium have similar electrom configurations
- Therefore, strontium, barium, and radium are grouped together on the periodic table

Therefore, strontium, barium, and radium are grouped together on the periodic table
Q: Strontium, barium, and radium are grouped together on the Periodic Table of the Elements because they all have
Context:
- If the elements have similar electron configurations , then the elements will be grouped into same family / group on the periodic table of elements 
- Strontium, barium, and radium have similar electrom configurations