Rubidium has two naturally occurring isotopes, rubidium-85
Chapter , Problem 2.36(choose chapter or problem)
Rubidium has two naturally occurring isotopes, rubidium-85 1atomic mass = 84.9118 amu; abundance = 72.15%2 and rubidium-87 1atomic mass = 86.9092 amu; abundance = 27.85%2. Calculate the atomic weight of rubidium.
Unfortunately, we don't have that question answered yet. But you can get it answered in just 5 hours by Logging in or Becoming a subscriber.
Becoming a subscriber
Or look for another answer