Why are electrons the majority charge carriers in n-type semiconductors?

In an n-type semiconductor, electrons are the majority charge carriers because of the process of doping with pentavalent atoms.12

When a semiconductor like silicon—which has four outer electrons—is doped with an element from column V of the periodic table, such as arsenic or phosphorus, the dopant atom provides five outer electrons. Four of these electrons participate in covalent bonding with the surrounding silicon atoms, while the fifth electron remains unbound and is donated to the conduction band.132

Because these donor atoms contribute an excess of free, negatively charged electrons to the crystal lattice, electrons become the most abundant charge carriers. This abundance of negative charge is why the material is classified as n-type.3452