Answer:
The correct feedback Zoe will have from this diagrammatic report will be the option B, which is the charge of the purple circles, should be positive because they represent the nuclei.
Step-by-step explanation:
Metals have fewer electrons in their outermost electron shells, which make them be good electron givers or better reducing agent, also due to their low ionization energy. Therefore, metals tend to become positively charged nucei after losing electrons to the neighboring atoms.
In the case of the metallic bond, the neighboring atoms are still metals. The big purple circles which represent the bigger metallic atoms should be marked with a positive sign, while the small circles in between the bid circles should be marked with negative signs.