Two pairs of Dobereiner's traid.

State the laws/ Define Dobereiner's Traid

X,Y and Z are the elements of a Dobereiner's Traid. If the atomic mass X is 7 and that of Z is 39,what should be the atomic mass of Y?

State whether the following statement is True' or False'. If false, write the correct statement for the same. Lithium,Potassium and Sodium are elements forming Dobereiner's traid .

The following group of elements have similar chemical properties.Identifiy with reason wheter it is a Dobereiner's traid N(14.00),P(30.9),As(74.9).

State the drawback of Dobereiner's triads:

The atomic masses of three elements A, B and C having similar chemical properties are 7, 23 and 39 respectively. a. Calculate the average atomic mass of element B according to Dobereiner's triads. b. Compare the average atomic mass of B with its atomic mass. c. What could the elements A, B and C be?

Answer the following questions: Give suitable illustration of Dobereiner's law of triads.

Choose the correct altrernative and write it along with its allotted alphabet : Lithium (Li),........and potassium (k) is Dobereiner's triad.

Answer the following questions: State the limitations of Dobereiner,s law of triads.

Chlorine, bromine and iodine form a Dobereiner's triad . Chlorine has atomic mass 35.5 and iodine has atomic mass 126.9 . Predict the atomic mass of bromine.