Question #f8d33 Chemistry Ionic Bonds Writing Ionic Formulas 1 Answer qin Apr 22, 2017 Calcium oxide, #CaO#, has a ratio of 1:1 for calcium ions to oxygen ions. Explanation: Calcium atoms form #Ca^(2+)# ions while oxygen atoms form #O^(2-)# ions. The ionic compound formed is #CaO# with equal amounts of both ions. Answer link Related questions How do you write ionic formulas for binary compounds? What is the ionic formula for calcium chloride? What is the ionic formula for calcium oxide? What is the ionic formula for lithium oxide? How do you write the formula for ionic compounds? How do I write #Sn(NO_3)_2# in Ionic formula? What is the empirical formula for an ionic compound? What is the molecular formula for chorate? Question #7086b Why are polyatomic ions covalent? See all questions in Writing Ionic Formulas Impact of this question 1771 views around the world You can reuse this answer Creative Commons License