Given, the number of the protons in zinc, Z=30
The atomic mass number, A=68
The atomic mass number is given by the sum of the number of protons and neutrons.
The symbol of an element is written as,
[tex]^{mass\text{ number}}_{atomic\text{ number}}El[/tex]
Thu the symbol of zinc is,
[tex]^{68}_{30}Zn[/tex]
