Question

qe 6. which of the following is the metallic ion in sodium fluoride?

f²+

na¹-

f²-

na¹+

clear all

Explanation:

Sodium fluoride is \(NaF\). Sodium (\(Na\)) is a metal. In ionic compounds, metals lose electrons to form cations. Sodium has one valence electron and loses it to form \(Na^{1 +}\) ion. Fluorine (\(F\)) is a non - metal and gains one electron to form \(F^{-}\) ion. The options \(F^{2+}\) and \(F^{2 -}\) are incorrect as fluorine typically gains one electron (not two) and forms \(F^{-}\). The option \(Na^{1-}\) is incorrect as sodium loses an electron (to form a positive ion).

Answer:

\(Na^{1 +}\) (the fourth option)