Question

How to calculate relative atomic mass of aluminium?

Answer 1

Answer:  26.98

Explanation:

1) find the mass of isotopes of aluminium (Al-26 and Al-27)

2)and we know if something occupies percentage X out of 100 then the other is 100-X.

3)Now , apply formula= (mass of Al-26) (X) + (100-X)(mass of Al-27)

                                                                      100

4)  ans = 26.98