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6.7 Electron Probability Density 212

No definite orbits

6.8 Radiative Transitions 218

What happens when an electron goes from one state to another

6.9 Selection Rules 220

Some transitions are more likely to occur than others

6.10 Zeeman Effect 223

How atoms interact with a magnetic field

CHAPTER 7

Many-Electron Atoms 228

7.1 Electron Spin 229

Round and round it goes forever

7.2 Exclusion Principle 231

A different set of quantum numbers for each electron in an atom

7.3 Symmetric and Antisymmetric Wave Functions 233

Fermions and bosons

7.4 Periodic Table 235

Organizing the elements

7.5 Atomic Structures 238

Shells and subshells of electrons

7.6 Explaining the Periodic Table 240

How an atom’s electron structure determines its chemical behavior

7.7 Spin-Orbit Coupling 247

Angular momenta linked magnetically

7.8 Total Angular Momentum 249

Both magnitude and direction are quantized

7.9 X-Ray Spectra 254

They arise from transitions to inner shells

APPENDIX:Atomic Spectra 259

CHAPTER 8

Molecules 266

8.1 The Molecular Bond 267

Electric forces hold atoms together to form molecules

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