Question

three elements which represents debonairs trade

Answer 1

Lithium sodium and potassium

Answer 2

Hi , mate !!!

the elements which represent the triade ( three ) of Dobereiner are :-

Li= 7

K= 39

average = 7+39 / 2 = 23


b )

Ca , Sr , Ba
40 , 87, 137


Cl ,Br , I
35.5,80,127



according to Dobereiner traied the element is the average atomic weight of other two


that is



A + B / 2 = C



hope it helps you !!

thanks !!

Ranjan kumar