When an atom of sodium and an atom of fluorine combine to form the salt, sodium fluoride, an
ionic bond, is formed. Which statement correctly
describes the behavior of the valence electron in
the ionic bond?
A. An electron from the fluorine atom moves to
the sodium atom forming two ions.
B.
An electron from the sodium atom moves to
the fluorine atom forming two ions.
C. An electron from the fluorine atom is shared
with the sodium atom forming a sodium ion.
D. An electron from the sodium atom is shared
with the fluorine atom forming a fluoride ion.

A branch of science which deals with the study of chemicals is called chemistry.

The correct answer to the question is B.

The reaction between the acid and base is called a neutralization reaction and forms the salt.

Salt is an ionic compound in which cation and anion joined together to form a compound. In an ionic compound, one element gives electrons to the other element to complete the outer shell and make a bond. In the question, sodium has more electrons and gives them to fluorine.

Hence, the correct option is B that is An electron from the sodium atom moves to  the fluorine atom forming two ions.

For more information, refer to the link:-

link

B.  An electron from the sodium atom moves to  the fluorine atom forming two ions.

Explanation:

In forming this ionic compound NaF, an electron is transferred from the sodium atom to the fluorine atom and two ions are formed.