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Ionic Bonding. Elements Goal = Stability Elements want to be stable In order to be stable they need to fill their outermost energy level completely –

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Presentation on theme: "Ionic Bonding. Elements Goal = Stability Elements want to be stable In order to be stable they need to fill their outermost energy level completely –"— Presentation transcript:

1 Ionic Bonding

2 Elements Goal = Stability Elements want to be stable In order to be stable they need to fill their outermost energy level completely – “Complete its octet” (oct meaning 8) – When outer level is filled No Charge = Stable – When outer level is not filled Charge = Unstable

3 How do we figure out and elements charge? Charge is determined by how many electrons they need to gain or lose to complete their outer level Every element in a group has the same charge – Example: All Halogens are -1 Logical Order Group Charge /

4 Add the following charges to the triangles at the bottom of your periodic table

5 Lets look at Magnesium. What is its charge? Lets look at Sulfur. What is its charge?

6 How can elements complete their octet? 2 Ways – Ionic bonds One element gives/takes electron from another element – Covalent Bonds Two elements share electrons

7 Ionic Bonds Bond in which one or more electrons from one atom are removed and attached to another atom. It is when atoms transfer electrons – One element gives electron – One element takes electron

8 How does ionic bonding work? Ionic Bonds occur between metals and nonmetals Opposite charges are going to attract Their charges will cancel out and become 0 – 0 = Stable – Example: = 0

9 Lets look at an example Why does NaCl work as an ionic bond?

10 Na +1 Cl -1 Opposites Attract * NaCl* Neutral and stable

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12 How does the sharing work? Na has the 1 lone electron to share in its outermost level Cl needs 1 to complete its octet Na will give 1 electron to Cl

13 Ionic Bonding Problems Step 1: Draw Lewis Dot Diagrams; Draw an arrow showing where the electron is moved Step 2: Rewrite the elements with their charges Step 3: Write the final compound Step 4: Write the name of the compound

14 Naming Ionic Compounds When you name a compound, you first put the metal and then the nonmetal. The nonmetal word would end in “-ide” instead of whatever it normally ends in So combining Na and Cl would be – SODIUM CHLORIDE

15 Ionic Bonding Problem: Sodium and Sulfur Step 1: Write Lewis dot with arrow Step 2: Write charges Step 3: Write Final Compound Step 4: Write Name

16 Example: Sodium and Sulfur Step 1 Step 2 Na +1 S -2 Na +1 Step 3 Na 2 S Step 4 : Sodium Sulfide


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