Question

Rubidium (Rb) has two isotopes. Using the data in the table below,

calculate the relative atomic mass of Rb. Give your answer to 3 significant
figures.

Answer 1

85.6

Step-by-step explanation:

(72 x 85) + (28 x 87)

-----------------------------

100

= 85.56

= 85.6 (3 s.f.)