When Sr and F combine to form a compound, which atom (s) will become an anion?/

a Sr only

b F only /

c both Sr and F

d neither Sr nor F

An anion is a negatively charged atom ie. Atoms that have gained an electron.

Flouirne is a group 7 element and it is highly electronegative. It easily draws electron to itself. With an electron, the outermost shell of Flouirne would mimic that of a noble gas.

Therefore, a combination of Sr and F would make F an electron acceptor and then an anion.