Question

Atomic wt. of P is 31 and Sb is 120. What will be the atomic wt. of As, as per doberiner triad rule:-
O 151
O 75.5
89.5
Unpredictable
his​

Answer 1

Answer:

average of both 175.5

refer ncert 11 part 1

Answer 2

Answer:

ans 75. 5

Explanation:

given                                                                                                                                           Atomic weight  of P is 31 ,                                                                                                           Atomic weight  of sb is 120 ,                                                                                                      According to DOBERNIER TRIAD RULE  , is the average of two .  So take the average of two atomic weight ,

= 31 + 120 / 2    =   151  / 2   =  75.5