Question

A, B and C are the elements of a wrebereinor'z triad. If the atomic most A is 7 and that if C is 39. What should be the atomic mass of B ?​

Answer 1

Answer:

23

average of 1and 2

46/2

Answer 2

According to dobereinor's triad when three elements are arranged in ascending order according to their atomic weights then the average of 1st and 3rd elements atomic weights=atomic weight of 2nd element.

so given A,B,C elements.

atomic weights of elementA and elementB are 7and39 respectively.

average of atomic weights of elementA And C.

=7+39/2

=46/2

=23

so,atomic weight of element B is 23