1.6 ActivitiesRemember1. Ions are atoms that have lost or gained electrons2. Ions form because an atom wants to have a full outer shell, and to do that they must either gain or lose electrons from their outermost shell, thus creating an ion3. Positively charged ions are called cations4. Negatively charged ions are called anions5. Most ionic compounds are made up of positive and negative ions, are usually solid at room temperature, normally have very high melting points, they dissolve in water to form aqueous solutions6. Metals and non-metals combine to make ionic compoundsThink1. A) Na 1+B) N 3-C) K 1+D) F 1-2. A) 4 lostB) 1 gainedC) 3 lost4) 2 gained3. A) LeadB) BromideC) ChromiumD) Selenide