Question

Three elements P,Q,R form a Dobereiner triad. the atomic weights of Pand R 35 and 127 respectively. find the atomic weight of Q?Immersive Reader
(1 Point)
121
81
120
40

Answer 1

Answer:

81

Explanation:

Atomic weight of Q= Atomic weight of (P+R)/2

=(35+127)/2

=162/2

=81