CH304K Chapter 2 Notes Part 2a

Any set of elements in the same period have their

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Unformatted text preview: d its particular set of chemical properties. Any set of elements in the same period have their highest energy electrons in s and p orbitals with the same value of n. OUTERMOST electrons (the ones in the last s and p orbitals) are called VALENCE electrons. The INNER ones are the CORE electrons. C is 1s2 2s2 2p2 Cl is 1s2 2s2 2p6 3s2 3p5 OR just [Ne] 3s2 3p5 Any chemical reaction just involves shuffling valence electrons! Valence Electrons The group number of an element shows how many valence (outer) electrons it has. (transition metals and the f-block are a little more complex, and we won’t discuss them) Having 8 valence electrons causes an atom to be very stable. This is why noble gases are so unreactive....
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This note was uploaded on 02/26/2014 for the course CH 304k taught by Professor Walker during the Spring '08 term at University of Texas at Austin.

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