Date: Day Plan: 1) Notes on I - Ionic Bonds 2) Practice 3) Homework – List the first 30 elements and there symbols in your notebook Opener: 1)Define Compound 2) What are you plans for Thanksgiving?

Review Compound: two or more elements chemically combined in a fixed ratio

I - Ionic Bonds and Ionic Compounds

A) Properties of Ionic Compounds Solids at room temperature Atoms arranged in a 3D pattern High melting points Conduct an electric current when melted or dissolved in water Fluorite CaF2 Pyrite FeS2

B. Cations Atoms can form ions by losing electrons in order to achieve an octet. Metals that tend to lose one or more electrons to form positive ions generally named by using the name of the parent atom.

Nonmetals tend to gain one or more electrons to form negative ions C. Anions named by using the root of the atom name followed by the suffix –ide.

D) Formation of Ionic Compounds Composed of first Cations (metal) then Anion (non- metal) ▫Example: Sodium Chloride – Draw the Lewis dot structure

Na Cl So What’s Happening? Na Cl +1 Cation Anion Opposites Attract

D) Formation Continued Electrically neutral -Metal gives their electrons to the non-metal creating an ionic bond Want 8 valence/full outer shell Example: Sodium Chloride ▫Sodium: 1s 2 2s 2 sp 6 3s 1  Na ▫Chlorine: 1s 2 2s 2 2p 6 3s 2 3p 5  Cl

Practice: Hydrogen and Bromine

Practice: Potassium and Iodine

Practice: Magnesium and Oxygen

Practice: Hydrogen and Oxygen (you may need more than one of each type of atom)

Practice: Hydrogen and Carbon (you may need more than one of each type of atom)

Practice: Potassium and Nitrogen (you may need more than one of each type of atom)

Practice: Calcium and Sulfur (you may need more than one of each type of atom)

One of the following pairs will form an ionic bond, one won’t. Draw out the one that will form the bond and describe why the other pair won’t bond. Lithium and MagnesiumZinc and Oxygen

Chemical Formula A written representation of a substance using symbols for its elements Subscripts Show how many of each TYPE of atom are in the compound Example: Water H 2 O

Binary Compound Composed of two elements Can be ionic or molecular

Chemical Formula for Ionic Compounds Formula Units ▫Lowest whole-number ratio of the ions in a compound Example: ▫Sodium Chloride Cinnabar HgS NaCl

Magnesium Chloride

Calcium Nitride

Naming Ionic Compounds Cation FIRST ▫Keeps name of element Anion SECOND ▫Add an –ide ending Number of each element DOES NOT MATTER Example: NaClMgCl 2 Sodium Chloride Magnesium Chloride

What’s Going On?! Copper (i) OxideCopper (ii) Oxide

Is it Cu +1 or Cu +2 ? CuSCu 2 S

Chemical Formula Practice: What is the formula for Aluminum Bromide?

Practice: Predict the formula if Oxygen and Potassium form an ionic bond.

Practice: Predict the formula if Copper(ii) and Nitrogen form and ionic bond.

One of the following pairs will form an ionic bond, one won’t. Draw out the one that will form the bond and describe why the other pair won’t bond. Argon and OxygenBarium and Carbon

Practice: Write the correct formula for the compounds formed from each pair of ions Potassium and SulfurCalcium and Oxygen

Practice: Write the formulas for each compound Barium ChlorideLithium Oxide

Practice: Which pairs of elements are likely to form ionic compounds? A. Cl and Br B. Li and Cl C. K and He D. I and Na