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Blake Lecture 10-17-08 - understanding ALL chemistry •...

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Blake 10-17-08 Chemistry Ex 1: Which is the largest? 1. Mg 2. Ca - ANSWER 3. P 4. As Ex 2: Which has the lowest first ionization energy? 1. Mg 2. Al - ANSWER 3. Si 4. P 5. S EXCEPTION WITH THE PERIODIC TABLE The ionization energy is higher from top to bottom and from left to right. Ionic Radii Isoelectronic Series 1. Ne, F - , O 2- , Na + , Mg 2+ = 10 e - Use cartoons again 1. Physics helps to explain chemistry! 2. Atoms – top to bottom {smallest to largest} Left to Right {Largest to smallest} Lewis Dot Structures Outermost electrons control bonding and reactivity, so they are the key to
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Unformatted text preview: understanding ALL chemistry • Valence electrons are the most important • Large configurations will lose an electron and a small configuration will gain an electron. • Want to get a full level of two • Sharing of electrons • SHARED ELECTRONS COUNT FOR BOTH ATOMS Five Step Procedure • Count valence electrons • Connect atoms with single bonds • Fill non-central atoms with electrons • Extra electrons go on central atom • If central atom < 8 electrons, have neighbor share...
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