Question

which of the following does not represent dobereiners traid

a) Li, Na, K b) Be, Mg, Ca c) N, P, As D) Cl, Br, l

Answer 1

Answer:

b) Be, Mg, Ca

Explanation:

The following is the dobereiner's triads

Answer 2

Answer:

N P As

Explanation:

the triad N, P and As will not represent the dobereiner triads because the average of autumn masses of Nitrogen(N), and arsenic(As) is not equal to the atomic mass of prosperous ( P) ....... atomic mass (N) =14

atomic mass (As) =74.9

average

$average \: = 74.9 + \frac{14.0}{2 } = 44.5$