Presentation is loading. Please wait.

Presentation is loading. Please wait.

Why Do Elements React?. Refresh your memory. Draw some atoms In your notes, draw Na Ne Ar Cl 11p+ 2 81 10p+ 2 8 18p+ 2 88 17p+ 2 87.

Similar presentations


Presentation on theme: "Why Do Elements React?. Refresh your memory. Draw some atoms In your notes, draw Na Ne Ar Cl 11p+ 2 81 10p+ 2 8 18p+ 2 88 17p+ 2 87."— Presentation transcript:

1 Why Do Elements React?

2 Refresh your memory. Draw some atoms In your notes, draw Na Ne Ar Cl 11p p p p+ 2 87

3 In actuality, a shell can only hold 8 e-. Sadly, the way we learned to draw atoms was not completely accurate. In actuality, a shell can only hold 8 e-. Remember that the shells actually have different shapes?

4 shells It turns out that the N, O, P and Q shells actually are made of a collection of shells which we will call sub-orbitals. The last shell can only hold 8 e-. In the Transition Metals, most of the e- go into the sub-orbitals leaving only 1, 2 or 3 e- in the last shell.

5 It’s actually pretty easy 1e- 2e- 1, 2 or 3e- 3e-4e-5e-6e-7e- 8e-

6 What do all the alkali metals have in common? One e- in their last shell What do all the alkali earth metals have in common? Two e- in their last shell What do all the Transition Metals have in common? One, Two or Three e- in their last shell

7 What do all the Carbon family have in common? Four e- in their last shell What do all the halogens have in common? Seven e- in their last shell What do all the Noble Gases have in common? Full Shells!!!

8 Who Cares, Right? Start with this question: All of these elements react except The Noble Gases! How are they physically different than other atoms?

9 The NOBLE GASES are COOL!!! All of the other elements are wannabes!

10 Looking Like a Noble gas Elements will gain or lose e- in order to make their last shell full. Look at Sodium for example:

11 Looking Like a Noble gas Na Ne Ar 11p p p Give away 1 e- Gain 7 e-

12 Looking Like a Noble gas Na 11p Give away 1 e- 11p+ 2 8 Sodium LOOKS LIKE Neon, but he has turned into an ion

13 Looking Like a Noble gas 11p+ 2 8 Sodium LOOKS LIKE Neon, but he has turned into an ion Ion An atom that is no longer neutral

14 Looking Like a Noble gas 11p+ 2 8 Sodium LOOKS LIKE Neon, but he has turned into an ion Only has 10e-, but still has 11 p+

15 Looking Like a Noble gas 11p+ 2 8 Sodium LOOKS LIKE Neon, but he has turned into an ion Valence The charge of an atom after it gains or lose e- Na ions have 10 e- and 11 p+ The valence would be +1

16 Valences , +2 or or –


Download ppt "Why Do Elements React?. Refresh your memory. Draw some atoms In your notes, draw Na Ne Ar Cl 11p+ 2 81 10p+ 2 8 18p+ 2 88 17p+ 2 87."

Similar presentations


Ads by Google