Presentation on theme: "The Quantum Mechanical Model"— Presentation transcript:
1The Quantum Mechanical Model Energy is quantized. It comes in chunks.A quanta is the amount of energy needed to move from one energy level to another.Since the energy of an atom is never “in between” there must be a quantum leap in energy.Erwin Schrodinger derived an equation that described the energy and position of the electrons in an atom
2The Quantum Mechanical Model The quantum mechanical model is a mathematical solutionIt is not like anything you can see.
3The Quantum Mechanical Model Has energy levels for electrons.Orbits are not circular.It can only tell us the probability of finding an electron a certain distance from the nucleus.
4QM model - Modern View The atom is mostly empty space Two regions 1. Nucleus- protons and neutrons2. Electron cloud- region where you might find an electron
5Other particlesProton - positively charged pieces 1840 times heavier than the electron – by E. GoldsteinNeutron - no charge but the same mass as a proton – by J. Chadwick
6Subatomic particles Relative mass Actual mass (g) Name Symbol Charge Electrone--119.11 x 10-28Protonp++118401.67 x 10-24Neutronn018401.67 x 10-24
7Size 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.