Does fluorine form a cation or a anion?
Fluorine is the most electronegative element in the periodic table. It needs just one electron to attain the stable noble gas configuration. A fluorine atom will thus gain an electron, thereby incurring a single negative charge, to form the fluoride ion, F-. This is an anion as it is a negatively charged ion.
Tin itself is a neutral element and therefore neither a cation nor an anion. A single tin atom can form a cation by donating two or four of its electrons to more electronegative atoms. A single tin atom is not electronegative enough to form an anion, but together with oxygen atoms, a tin atom can form a polyatomic anion.
An element can become a cation by loosing electrons and an anion by gaining electrons. For example:- Na(Sodium) atom has 11 electrons whereas its cation Na+ has 10 electrons. Cl(chlorine) atom has 17 electrons but its anion Cl- has 18 electrons. The element will form a cation or anion will be decided by the no. of electrons in its outermost shell. Metals generally form cations and non-metals generally form anions. However, some elements like carbon…