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Published byJaden Wagner Modified over 2 years ago

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The Quantum Mechanical Model l Energy is quantized. It comes in chunks. l A quanta is the amount of energy needed to move from one energy level to another. l Since the energy of an atom is never in between there must be a quantum leap in energy. l Erwin Schrodinger derived an equation that described the energy and position of the electrons in an atom

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l The quantum mechanical model is a mathematical solution l It is not like anything you can see. The Quantum Mechanical Model

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l Has energy levels for electrons. l Orbits are not circular. l It can only tell us the probability of finding an electron a certain distance from the nucleus. The Quantum Mechanical Model

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QM model - Modern View n The atom is mostly empty space n Two regions 1. Nucleus- protons and neutrons 2. Electron cloud- region where you might find an electron

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Other particles n Proton - positively charged pieces 1840 times heavier than the electron – by E. Goldstein n Neutron - no charge but the same mass as a proton – by J. Chadwick

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Subatomic particles Electron Proton Neutron NameSymbolCharge Relative mass Actual mass (g) e-e- p+p+ n0n x x

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Size of an atom Nucleus tiny compared to atom If the atom was the size of a football stadium, the nucleus would be the size of a marble.

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