Reading Log Number 5 - Jacob Zipperstein 3 Period Chemistry...

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Jacob Zipperstein 3 rd Period Chemistry November 12, 2007 Reading Log Chapter 5 Electrons in Atoms 5.1 Light and Quantized Energy Electromagnetic radiation - energy that travels in wave form. Wavelength (λ) - is the distance between equal points on a wave Frequency (ν) - is the number of waves that pass by per second Amplitude - is the wave’s height from the origin to the crest (or trough) The wave’s wavelength times its frequency equals the speed of light ν x λ = c (speed of light) wavelength and frequency are inversely related Waves = vary in frequency and wavelength: Smaller wavelength means higher frequency and more energy Color spectrum an example of different waves (red low energy violet high energy) Quantum is the minimum amount of energy that can be gained of lost by an atom This was discovered by studying why light is given off from heated objects Planck discovered that matter can gain or lose energy in amounts called quanta. He found the following equation: E(energy/quantum) = h(Planck’s constant) x ν (frequency) Since the one quantum is the minimum amount of energy given off only whole number multiples of h x ν can be given off.
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