Question

a,b and c are the elements in dobereiner's triad . if the atomic mass of a is 40 and that of c is 137, what would be the atomic mass of b ?​

Answer 1

Answer:

88.5

Explanation:

atomic mass of b = average of atomic masses of and c

= 40+137/2 = 177/2= 88.5

Answer 2

Answer:

88.2

Explanation:

as we know the middle element's atomic mass if the average of other two so 40+177÷2=88.2