GC Atomic Structure

Which one among the following contains the most neutrons?

  1. 6129Cu
  2. 5926Fe
  3. 6030Zn2+
  4. 6130Zn

Answer

Neutrons = Atomic mass - Atomic number

In Fe, 59 - 26 = 36

In Cu, 61 - 29 = 32

In Zn, 61 - 30 = 31

In Zn2+, 60 - 30 = 30

The correct option is B.