EM Spectrum.

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…the study of how light and matter interact
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Presentation transcript:

EM Spectrum

Wave Characteristics of EM Radiation

Wave Parameters =wavelength of wave =frequency of wave – number of oscillations per second c=speed of wave=speed of light

Refraction

Photoelectric Effect

Atomic Spectrum of Hydrogen

Energy Levels of the Hydrogen Atom

Bohr’s Atom Bohr model - electrons orbit the nucleus in stable orbits. Although not a completely accurate model, it can be used to explain absorption and emission. Electrons move from low energy to higher energy orbits by absorbing energy. Electrons move from high energy to lower energy orbits by emitting energy. Lower energy orbits are closer to the nucleus.

Comparison of Bohr and QM Model Electron Particle Wave Electron Orbit Fixed Spread Out (Orbitals) Energy Quantised

Energy Order of Orbitals

Use of Periodic Table

Change in Atomic Radii

Change in Ionisation Energy

Change in Electron Affinity

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