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ELECTROMAGNETIC SPECTRUM

ELECTROMAGNETIC SPECTRUM. OUTER (VALENCE) ELECTRONS AND ATOMIC STRUCTURE. Outer Valence Electrons in Atoms & Molecules Give Rise to Atomic and Molecular Spectra in U.V. and VISIBLE Portions of the Electromagnetic Spectrum. ORBITALS. Remember: An Atomic Orbital is actually a

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ELECTROMAGNETIC SPECTRUM

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  1. ELECTROMAGNETIC SPECTRUM

  2. OUTER (VALENCE) ELECTRONS AND ATOMIC STRUCTURE • Outer Valence Electrons in Atoms & Molecules Give Rise to Atomic and Molecular Spectra in U.V. and VISIBLE Portions of the Electromagnetic Spectrum

  3. ORBITALS • Remember: • An Atomic Orbital is actually a Wave Function which describes the probability of finding an electron in a particular region of space around a central nucleus

  4. ENERGY LEVELS FOR HYDROGEN ATOMIC ORBITALS

  5. ATOMIC QUANTUM NUMBERS • Principal Quantum No: n = 1,2,3,… • Angular Momentum Q. No: l = 0,1, … (n-1) • Magnetic Q. No: ml = -l,…0,…,+l • Spin Q. No: s = +/- ½

  6. ANGULAR QUANTUM NOS. Angular Q. No: Letter l = 0s l = 1p l = 2 d l = 3 f

  7. ORBITALS vs. PRINCIPAL Q. No. n • e.g. n = 4, l = 0,1,2,3 • So l = 0 4s l = 1 4p l = 2 4d l = 3 4f

  8. Ml values (–1 …+1). Adds up to (2l +1) • So: One 4s orbital Three 4 p orbitals Five 4d orbitals Seven 4f orbitals

  9. HYDROGEN s ORBITALS

  10. HYDROGEN 2px ORBITALS

  11. HYDROGEN 2py ORBITALS

  12. HYDROGEN 2pz ORBITALS

  13. HYDROGEN 3d ORBITALS

  14. Blackbody Radiation vs. Frequency (Wavelength)

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