Sodium chloride is a compound and hasn't valence; sodium and chlorine, as elements are monovalent,
Sodium is monovalent, the cation is Na+. Chlorine is monovalent, the anion is Cl-.
Monovalent metals are metals that can form ions with a charge of +1. Examples of monovalent metals include lithium (Li), sodium (Na), and potassium (K). These metals typically lose one electron to achieve a stable electron configuration.
The charge on a monovalent ion is +1, meaning it has lost one electron and carries a positive charge. Examples of monovalent ions include sodium (Na+) and chloride (Cl-).
Each ion in a fully dissociating solute salt, such as the two chlorides stated in the question, has its own specific conductance. Calcium ions are divalent while sodium ions are monovalent, and divalent ions usually have a specific conductance large enough to more than make up for the fact that there are only half as many of them for a given amount of chloride as in the chlorides of monovalent cations.
Na+ ions (monovalent +1)
A monovalent ion is a cation that only has one valence electron to form an ionic bond with something else. Typically they are the alkali metals--Lithium, Sodium, Potassium, Rubidium, Caesium and Francium. Some transition metals can be found to be monovalent ions.
The chemical formula of magnesium chloride is MgCl2. The chemical formula of sodium chloride is NaCl. The chemical formula of calcium carbonateis CaCO3. Na form a monovalent cation, chloride is a monovalent anion, carbonate is a bivalent anion, calcium and magnesium forms bivalent cations.
Sodium chloride has two atoms in the formula unit (NaCl): sodium and chlorine.
Sodium chloride is a compound.
Sodium chloride is not a cause of cancer.
Solid sodium chloride is not an electrolyte.Sodium chloride in water solutions or molten sodium chloride are electrolytes.
Sodium chloride is formed from sodium and chlorine.