Answer:
[tex]Zn^{2+}[/tex]
Explanation:
Hello,
In this case, since metals tend to lose electrons, they usually become the cations when chemical compounds are formed so the other element should be negative to allow their interactions to take place.
In such a way, since oxygen is known to be negatively charged as -2 and their subscripts are both 1, we infer that the oxidation state of zinc is +2, therefore, it is written as an ion as follows:
[tex]Zn^{2+}[/tex]
Best regards.