Multiple ChoiceWhen writing the formula for an ionic compound, why must the total positive and negative charges balance?39views
Multiple ChoiceWhen MgBr_2 is dissolved in water, how many ions are produced from one formula unit?35views
Multiple ChoiceWhat is the name given to an atom that gains or loses electrons in a chemical reaction?39views
Multiple ChoiceWhich of the following lists all the ions present in the reactants when calcium chloride and sodium phosphate are dissolved in water?33views
Multiple ChoiceWhich of the following best describes what it means for two species to be isoelectronic?39views