Question

Show that chlorine, bromine and iodine ( atomic masses 35.5,80 and 127 respectively) constitude a triad

Answer 1

Answer:

It will constitute a traid because the Atomic mass of Bromine is approximately the arithmetic mean if atomic masses of Chlorine and Iodine!

Explanation:

Solution:

Atomic mass of:

Chlorine=35.5

Bromine=80

Iodine=127

To show:

(Atomic mass of Chlorine+ Atomic mass of Iodine)/2= Atomic mass of Bromine

> (35.5+127)/2= 162.5/2= 81.25

81.25 is approximately nearer to the atomic mass of Bromine.

Also, the elements in a traid do not completely follow the rule, but the masses are approximately same!

since 81.5 is approximately nearer to 80 (Mass of Bromine), therefore these three constitute the halogen traid (3rd Triad)

Hence proved! !