Question

0 N, P and As have similar properties,
check whether the average of atomic
masses of N (14) and As (1409) is equal to
the atomic mass of P (3) Could we call
it as a Dobereiner traid? why? Give
reason.​

Answer 1

Answer:

We assume that N, P, As follow the Dobereiner's triads. It follows that M(P)=

2

(M(N)+M(As))

M(P)=

2

(14+74.9)

=44.45

Absolute error in mass of phosphorous =44.45−31=13.45