Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions

Dobereiner suggested that calcium ( Ca ), strontium ( Sr ) and barium ( Ba ) were also a triad. Use relative atomic masses to explain why




This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
According to Dobereiner, the atomic weight(or the atomic mass) of the central element is nearly or exactly equal to the mean of the atomic weights of the other two elements in that triad.
In the case of  Ca ( at. wt. = 40.0)
                      Sr ( at. wt. = 87.6)
                      Ba ( at. wt. = 137.3)
The atomic weight of the central element, Sr = (40 + 137.3)/2
                                                                 = (177.3)/2
                                                                 = 88.6
As this calculated value(=88.6) of Strontium is near to its actual atomic weight value(=87.6) ,Dobereiner suggested that Calcium , Strontium and Barium were also a triad.
1 5 1
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts