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Name_____________________________________Period_______Date____________ The Quantum Model of the Atom Directions: Complete the following notes and charts as you read through section 4.2 in your textbook. French scientist, ____________________________________, suggested that electrons have wavelike properties. Heisenberg uncertainty principle – Quantum theory – Orbital – In the Bohr atomic model, electrons of increasing __________________ occupy orbits farther and farther from the nucleus. Quantum numbers - 1. Principal Quantum number(n) - Energy Level 1 2 3 4 5 6 7 Total number of orbitals (n2) Maximum number of electrons (2n2) 2. Angular Momentum Quantum Number (l) sublevel - division of an energy level. Number of sublevel = value of n Ex: n = 3 # of sublevels equals 3 n = 4 # of sublevels equals 4 values : l = s(0), p(1), d(2), f(3) energy : s < p < d < f l describes the shape of the electron cloud. Energy Level # of Sublevels Value of Sublevels 1 2 3 4 3. Magnetic Quantum Number (m) Number of orbitals per sublevel = 2l + 1 Values assigned to orbitals are whole numbers, including zero, from –l to +l. Max number of electrons per orbital = 2 electrons per orbital Sublevel # of Orbitals Orbital Values s (0) p (1) d (2) f (3) 4. Magnetic Spin Quantum Number(s) values assigned = +1/2 clockwise rotation -1/2 counterclockwise rotation electrons with same s quantum numbers have parallel spins Max # of Electrons