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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Solution

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.

$A t o m i c m a s s o f B = \frac{A t o m i c m a s s o f A + A t o m i c m a s s o f C}{2}$ $\Rightarrow$ $\frac{7 + 23}{2}$
$\Rightarrow$ 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.

$A t o m i c m a s s o f B = \frac{A t o m i c m a s s o f A + A t o m i c m a s s o f C}{2}$ $\Rightarrow$ $\frac{7 + 23}{2}$
$\Rightarrow$ 15.