The symbol of the lead(IV) ion is ?

Pb4+

metal sulphide

To determine the symbol of the lead(IV) ion, you need to understand the charge of the lead ion and its atomic symbol.

1. Determine the atomic symbol of lead: The atomic symbol for lead is Pb. Check the periodic table or any reputable chemistry resource to confirm this.

2. Determine the charge of the lead(IV) ion: The Roman numeral "IV" in lead(IV) indicates that the lead ion has a charge of 4+. The charge of an ion can be determined by looking at its electron configuration or by knowing the overall charge of the compound it is a part of.

3. Combine the atomic symbol and the ion charge: To represent the lead(IV) ion, you need to show both the atomic symbol and the ion charge. Since the 4+ charge indicates that four electrons have been lost, you represent this by adding the charge as a superscript after the atomic symbol. The symbol for the lead(IV) ion is Pb^4+.

Keep in mind that the charge of an ion can vary depending on the element's chemical environment or compound it is found in, so it's always important to double-check in the specific context you are working with.