Question

Atomic mass of boron is 10.81. It has two isotopes with 80% and 20% abundance respectively. The atomic mass of the isotope having 80% abundance is 11.01. The atomic mass of the other isotope is:
soln​

Answer 1

Answer:

10.01

Explanation:

Let the mass of other isotope be x

∴10.81×100=11.01×80+20×x

⇒x=10.01. Thus the mass of other isotope is 10.01.