Question

# In Dobereiner classification of elements, the atomic weight of the middle element is equal to the ________ of the extreme elements of a triad.

A
sum
B
average
C
difference
D
fraction

Solution

## The correct option is B averageIn Dobernier classification of elements, the atomic weight of the middle element is equal to the average of the extreme elements atomic weight of a triad.Example          Atomic weightLithium---------        7Sodium---------     23Potassium-------    39Average of atomic weights of lithium and  Potassium = $$\dfrac{7+39}{2} = \dfrac {46}{2}$$  =2323 is the atomic weight of sodium.Chemistry

Suggest Corrections

0

Similar questions
View More