Chapter 20 Section 1

1. Stability in Bonding Chapter 20Section 1

2. Hiding in plain sight • What is the statue of liberty made of?

3. Compounds rarely look like the elements the contain. • Copper is a shiny “coppery” color. • Sulfur is a powdery yellow substance that smells like rotten eggs. • The two combine to form Copper Sulfate which is a toxic blue – green material.

4. Today’s statues • Bronze • Mainly copper, mixed with some tin. • Copper sulfate will still form, but at a slower rate. • Where does the Sulfur come from???

5. Let’s mix some stuff! + Now let’s eat it!

6. Everybody loves French Fries! • So lets put a poisonous explosive on them! • Table Salt! • Very stable • Is perfectly safe to eat and is necessary for our bodies to function. • When chemicals combine the properties of the new product are often very different from the properties of the original ingredients.

7. Making atoms stable • Atoms will bonds with each other in order to become more stable. • Atoms want to have a complete octave of valence electrons to be stable. • Lets look at some atoms and see how stable they are. • The most stable elements are those with full octaves. • The Noble Gasses

8. The Electron Dot Structure or Lewis Dot structure • Instead of drawing the entire atom every time, we will just use the chemical symbol of each element and surround it with the valence electrons only. • Remember, only the “valence electrons” contribute to the chemical bonding.

9. Giving and Sharing • In order to form perfect octaves atoms will give up, steal or share electrons with other atoms. • Once stability has been reached, a chemical bondis formed between the atoms.