1. Ionic Bonding

2. Key Terms Ion: a charged atom Cation: a positively charged ion
Anion: a negatively charged ion
Polyatomic ion: A group of 2 or more elements that act together as one ion

3. Ionic bonding
When an atom that tends to lose electrons comes in contact with an atom that tends to gain electrons, the result is an electron transfer.
The two atoms become a cation and an anion

4. Ionic bonding
The two newly-formed ions are attracted to each other, and form an ionic compound
These two ions are connected with an ionic bond
Ionic bonds almost always involve one metal and one nonmetal

7. Ionic compound formulas
The net charge of an ionic compound must be zero
The formula shows the lowest ratio of the elements; cation then anion

8. Naming ionic compounds
General rule:
State the cation’s element name
State the anion’s element name but change the end to -ide

9. Naming ionic compounds
When the cation is a transition metal, you must state its charge as a roman numeral, then state the anion ending in -ide

10. Naming ionic compounds
When the anion is a polyatomic ion, you state the cation’s element name, then state the special name for the polyatomic ion

12. 12.1 and 12.2 Describe how atoms form new substances by transferring electrons (ionic bonding)