State the rules to write the formulas of mononuclear coordination entities.

(N/A) The following rules are applied while writing the formulas:
$1$. The central atom is listed first.
$2$. The ligands are then listed in alphabetical order. The placement of a ligand in the list does not depend on its charge.
$3$. Polydentate ligands are sorted alphabetically. In case of an abbreviated ligand,the first letter of the abbreviation is used to determine the position of the ligand in the alphabetical order.
$4$. The formula for the entire coordination entity,whether charged or not,is enclosed in square brackets. When ligands are polyatomic,their formulas are enclosed in parentheses. Ligand abbreviations are also enclosed in parentheses.
$5$. There should be no space between the ligands and the metal within a coordination sphere.
$6$. When the formula of a charged coordination entity is to be written without that of the counter ion,the charge is indicated outside the square brackets as a right superscript with the number before the sign. For example,$[Co(CN)_{6}]^{3-}$,$[Cr(H_{2}O)_{6}]^{3+}$,etc.
$7$. The charge of the cation$(s)$ is balanced by the charge of the anion$(s)$.