If atomic mass of calcium is 40 and that of barium is 137, then the atomic mass of strontium, which constitutes the triad of Ca. Sr and Ba is:
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1
Answer:
88.5
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according to the law of triad
1st element+last element/2 gives atomic mass of middle element
40+137÷2
=88.5
hence its atomic mass is 88.5
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