Question

What is the atomic number z of 73li?

Answer 1

I think thats a trick question on the periodic table there is no Z, theres Zi which is zinc but no Z

Answer 2

`^7 _3 {Li}` means that the element is Lithium (Li), 7 corresponds to its mass number (sum of protons and neutrons), 3 corresponds to its atomic number (number of protons in the nucleus).

The problem asks for the atomic number (Z) of this isotope: based on what we said previously, the answer is 3.