Valency And Ions

Trivalent electropositive ions
        When an atom looses three electrons or if any Radical or ion has tripositive charge on it then it is known as Trivalent electropositive ion 

Tetravalent electropositive ions
    When an atom looses four electrons or if any Radical or ion has  tetrapositive charge on it then it is known as Tetravalent electropositive ion

Pentavalent electropositive ions
    Radical or ion has pentapositive charge on it then it is known as Pentavalent electropositive ion