There are several exceptions to the Stock system rule of using Roman numerals in the name of a cation. Two of the most
common exceptions are zinc and silver. In compounds, zinc
always carries a 2+ charge and silver nearly always carries a 1+
charge. For that reason, the Stock system is typically not used
for compounds of zinc and silver.
What is the correct formula for silver fluoride?
a AgF2
b SiF2
C SiF
d AgF