Multiple choice

In case of the triad containing the elements Ba, Ca and Sr, which of the following statements is correct?

  1. The atomic mass of Ba is roughly the average of the atomic masses of the other two elements.

  2. The atomic mass of Sr is roughly the average of the atomic masses of the other two elements.

  3. The atomic mass of Ba is less than the average of the atomic masses of the other two elements.

  4. The atomic mass of Sr is more than the average of the atomic masses of the other two elements.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

According to the definition of Dobereiner's law of triads, (the atomic mass of the middle element was roughly the average of the atomic masses of the other two elements) the statement (2) is correct.  

Keep practicing — related questions