The maximum covalency is equal to :

Explanation

In chemical bonding, atoms can share electrons to form covalent bonds. The number of covalent bonds an atom can form, known as its covalency, depends on the number of available valence electrons. Valence electrons are the electrons in the outermost energy level or shell of an atom.For elements in the s and p blocks of the periodic table (groups 1-7 and 13-18), the valence electrons are found in the s and p orbitals, respectively. The s orbital can hold a maximum of 2 electrons, and each p orbital can hold a maximum of 6 electrons.To determine the number of valence electrons for an atom, you can look at its position in the periodic table. The group number tells you the number of valence electrons for elements in groups 1-18. For example, elements in group 1 have 1 valence electron, elements in group 14 have 4 valence electrons, and elements in group 17 have 7 valence electrons.The maximum covalency of an atom is related to its valence electrons because covalent bonds are formed by sharing these electrons. The general rule is that the maximum covalency can be determined by dividing the number of valence electrons by 2. This is because each covalent bond involves the sharing of two electrons-one from each atom.