Bundle 2: Periodic Table and Bonding IONIC BONDING Bundle 2: Periodic Table and Bonding

This is the STRONGEST bond between elements. Ionic bonding An Ionic Bond is an electrostatic attraction between a metal and non- metal that involves a transfer of electrons. This is the STRONGEST bond between elements.

What is an ionic bond? An Ionic Bond (strongest) is the bond between a metal and non-metal that involves a TRANSFER of electrons When an atom loses a valence electron to another atom, it becomes a (+) ion. This is a CATION. When an atom accepts a valence electron from another atom, it becomes a (-) ion. This is an ANION.

Formation of an Ionic Bond FULL OCTET

EXAMPLE Na Cl 1 valence e- 7 valence e-

Na Cl EXAMPLE Cation – [Na] +1 Anion – [Cl] -1 8 valence e-

Naming Ionic compounds (Nomenclature) The FIRST name is the same as the CATION name The SECOND name is the ANION name with the ending –IDE. EXAMPLE [Na]+ Sodium [Cl]- Chlorine NaCl Sodium Chloride Cation Anion Ionic Compound Name

Cation Anion Ca 2+ S 2-

Lewis Dot Structure 2+ 1- DROP AND SWITCH THE CHARGES Shows the # of valence elecrons the atom has 2+ 1- What is the charge on Ca? What is the charge on F? How many atoms of Ca and F are needed? DROP AND SWITCH THE CHARGES

[ [ [ [ [ [ Ca 2+ F-1 Ca2 F1 CaF2 Drop Switch Lewis Dot Structure -1 +2 -1 CaF2 [ [ [ [ [ [

Lewis Dot Structure Na and N [ [ -3 +1 [ [ 1+ 3- Drop Na1 N3 Switch +1 [ +1 -3 [ [ Na3N [ [ [ [ [ +1

[ [ Learning Check Potassium Fluoride Metal Non-Metal Yes +1 What is the Lewis Dot Structure for Potassium? What is the Oxidation # (or charge) on Potassium? Is Potassium a metal or non-metal? Is Fluorine a metal or non-metal? Can Potassium bond ionically with Fluorine? What would the name of the compound be if Potassium bonded with Fluorine? [ +1 Metal Non-Metal Yes Potassium Fluoride