Question

Elements A ,Band,C have atomic masses 7,23 and x respectively.These elements also formed Dobeneer triads . Calculate the x​

Answer 1

Answer:

35

Explanation:

9163+1037+_91177!_2

Answer 2

Explanation:

) The average atomic mass of elements A and C =

2

7+39

=

2

46

=23

(b) The average atomic mass of elements A and C is the same as the atomic mass of element B=23.

(c) The element A is Lithium (Li), B is Sodium (Na) and C is Potassium (K). They are Dobereiner's Triads because in Dobereiner's Triads the atomic mass of the middle element is approximately the mean of the atomic masses of other two elements.