Question

which of the following combinations would need roman numerals in the name?
potassium + fluorine, beryllium + oxygen, boron + iodine, silver + oxygen

Answer 1

Answer:

Silver + Oxygen

Explanation:

Silver belongs to d-group elements. Due to d - electron configurations and orbital cleavage in aqueous solutions, multiple valencies by a single element is common. Hence, silver will require a roman numeral in name

Answer 2

Answer:

If any of them are transition metals I believe that they would need to have roman numerals.