Question

Three elements x, y, z constitute dobereiners triad. If the atomic masses of x and y are 32 and 128 respectively, predict the atomic mass of y

Answer 1

Explanation:

Dobereiner’s triads: Dobereiner in 1829 observed that there were certain groups of three similar elements called triads. The elements of a triad had similar properties and when arranged in order of increasing atomic masses, the atomic mass and properties of the middle element was roughly the arithmetic mean of the other two. Therefore atomic mass of C is 39.

Answer 2

Answer:

y=80

Explanation:

y=x+z/2

  =32+128/2

  =160/2

  =80