heptavalency التعريفات والمعاني == English == === Etymology === From hepta- + valency. === Noun === heptavalency (uncountable) The condition of being heptavalent شارك هذه المقالة: Facebook Twitter WhatsApp LinkedIn كلمات ذات صلة heptavalent heptavalente heptavalence heptavalentes hexavalency