Atomic mass of Cl=35.5u and that of I=127u . According to Dobereiner's triad rule, atomic mass of Br will be u. Round off your answer to the nearest integer.

Question

Atomic mass of Cl=35.5u and that of I=127u . According to Dobereiner's triad rule, atomic mass of Br will be u. Round off your answer to the nearest integer. (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

According to Dobereiner, the middle element has an atomic mass almost the average of the other two elements. Hence, (35 . 5 + 127/2)=81.25u

Q. Atomic mass of $Cl = 35.5 u$ and that of $I = 127 u$ . According to Dobereiner's triad rule, atomic mass of $B r$ will be________ $u .$
Round off your answer to the nearest integer.

According to Dobereiner, the middle element has an atomic mass almost the average of the other two elements.
Hence, $\frac{35.5 + 127}{2} = 81.25 u$

Q. Atomic mass of Cl=35.5u and that of I=127u . According to Dobereiner's triad rule, atomic mass of Br will be________ u. Round off your answer to the nearest integer.

According to Dobereiner, the middle element has an atomic mass almost the average of the other two elements. Hence, 235.5+127​=81.25u

Q. Atomic mass of $Cl = 35.5 u$ and that of $I = 127 u$ . According to Dobereiner's triad rule, atomic mass of $B r$ will be________ $u .$
Round off your answer to the nearest integer.

According to Dobereiner, the middle element has an atomic mass almost the average of the other two elements.
Hence, $\frac{35.5 + 127}{2} = 81.25 u$