(A, B, C) is a Dobereiner’s triad. complete the following chart and give reason for the answer: Element - Atomic mass

Question

(A, B, C) is a Dobereiner’s triad. complete the following chart and give reason for the answer:

Element	A	B	C
Atomic mass	10.08	12.01	…

Answer 1

Element	A	B	C
Atomic mass	10.08	12.01	13.94

Let the atomic mass of C be x. As (A, B, C) is a Dobereiner’s triad, \(\frac{x+10.08}{2}\) = 12.01

∴ x = 24.02 – 10.08 = 13.94

∴ atomic mass of C = 13.94.