Question

atomic mass of aluminium is 27 .
prove it step by step . ​

Answer 1

Answer:

When an atomic nmbr of an atom is even then the foemula is = 2n . And when the atomic nmbr is odd the formulae to get atomic mass is = 2n + 1

so atomic mass of Al = 2n +1

= 2×13 + 1

= 27