Question

In Dobereiner triad: Ca, Sr, Ba are atomic mass of first and second elements are 40 and

88 respectively. Then, what would be approximately the atomic mass of Ba?

(A) 128 (B) 136 (C) 176 (D) 64
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Answer 1

Answer:

40+88/2

=128/2

=64

hence d is correct answer

Answer 2

Explanation:

In Dobereiner triad: Ca, Sr, Ba are atomic mass of first and second elements are 40 and

88 respectively. Then, what would be approximately the atomic mass .

answer; -)176