Which type of bonding involves the complete transfer of a valence electron from a less electronegative atom to a more electronegative one?

The answer is: a. ionic bonding.

Ionic bond is the electrostatic attraction between oppositely charged ions (cations and anions).

(brainliest would be great)

For example, compound magnesium chloride (MgCl₂) has ionic bond.

In this example, chlorine is large company, because it has greater electronegativity than magnesium (small company) and take electrons (assets) from it.

Magnesium (Mg) transfers two electrons, became positive cation, to chlorine (Cl), which became negative anion.

Magnesium is metal from group 2 and chlorine is nonmetal from group 17 of the Periodic table.

Electronegativity (χ) is a property that describes the tendency of an atom to attract a shared pair of electrons.

Ionic or electrovalent bonds

Explanation:

Ionic or electrovalent bonds are interatomic or intramolecular bonds which are formed between two kinds of atoms having a large electronegativity difference usually 2.1.

Electronegativity is the property that combines the ability of an atom to gain or lose electrons. It is expressed as the tendency with which atoms of elements attracts valence electrons in a chemical bond.

In this bond type, a metal transfers its electrons to a more electronegative atom which is a non-metal.