Question

Calculate the atomic mass of boron, which occurs naturally as 20% boron- 10 and 80% boron-11.

Answer 1

please make me the brainiest if this helps;

Average Atomic mass of any element =[E
Abundance* mass of element] /100
= 10*20
‡11*80 /100

Answer 2

Relative atmoic mass = 20 x 10 + 80 x 11
___________
100
=10.8

Hope this helps u :)