Question

A mystery element "X” has two stable isotopes X-50 which occurs 40% of the time

and X-60 which occurs 60% of the time. What is the average mass of element "X"?

A-50 amu
B-54 amu
C-56 amu
D-60 amu

Answer 1

probaly C

Step-by-step explanation:

I'm not sure on this one...