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CH3 [Compatibility Mode]

CH3 [Compatibility Mode] - Chapter 3 Atomic Structure and...

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1 Chapter 3- Atomic Structure and Properties There are two classes of electrons in an atom: Core - In low energy filled shells tightly bound In low energy filled shells, tightly bound Valence - In highest energy orbitals, more loosely bound Suggested Ch3 practice problems: 1, 7, 9, 11, 13 4 s 3 d 4 p sublevels E/r Atomic Orbital Energy Level Diagram 1 s 2 s 2 p 3 s 3 p Outermost shell-highest E electrons = most reactive and most important in bonding! What atom is this? Valence electrons General rules s-block: highest energy s electrons Na 3s 1 Ca 4s 2 d-block: highest energy s and d electrons V 4s 2 3d 3 Cu 4s 1 3d 10 p-block: highest energy s and p electrons P 3s 2 3p 3 Ga 4s 2 4p 1 Noble gases have all core electrons What is the VALENCE configuration of nickel (Ni)? 1. 4s 2 3d 8 2. 4s 2 4d 8 3 3d 8 1 2 3 4 0% 0% 0% 0% 3. 4. [Ar] 4s 2 3d 8 10
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