Valency And Ions

Monovalent electropositive ions
    When an atom looses one electron or if any Radical or ion has uni positive charge on it then it is known as Monovalent electropositive ion or Univalent Electropositive ion

Bivalent electropositive ions
    When an atom looses two electrons or if any Radical or ion has dipositive charge on it then it is known as Bivalent electropositive ion