Question

the oxidation number for the element fluorine when it is in a compound is always:

-1

-2

Explanation:

Fluorine is the most electronegative element, meaning it has a strong tendency to gain one electron to achieve a stable electron configuration (octet rule). In compounds, it always has an oxidation number of -1 because it gains one electron to form a fluoride ion (\(F^-\)). Oxidation number -2 is typical for oxygen in most compounds (except in peroxides, etc.), not fluorine.

Answer:

-1 (the option with -1, e.g., if the first option is labeled as A, then A. -1)