A, B & C are the elements of the Dobereiner's triads. If the atomic mass of A is 7 and that of C is 23, then the atomic mass of B will be __.

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A, B & C are the elements of the Dobereiner's triads. If the atomic mass of A is 7 and that of C is 23, then the atomic mass of B will be 15.

$Atomic mass of B = \frac{Atomic mass of A + Atomic mass of C}{2} \Rightarrow \frac{7 + 23}{2}$
$\Rightarrow$ 15.

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A, B & C are the elements of the Dobereiner's triads. If the atomic mass of A is 7 and that of C is 23, then the atomic mass of B will be __.

A, B & C are the elements of the Dobereiner's triads. If the atomic mass of A is 7 and that of C is 23, then the atomic mass of B will be 15. Atomic mass of B=Atomic mass of A + Atomic mass of C2⇒7+232 ⇒ 15.

A, B & C are the elements of the Dobereiner's triads. If the atomic mass of A is 7 and that of C is 23, then the atomic mass of B will be 15.

$Atomic mass of B = \frac{Atomic mass of A + Atomic mass of C}{2} \Rightarrow \frac{7 + 23}{2}$
$\Rightarrow$ 15.