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Models of the Atom… A. Who was he??? 1. Danish physicist 2. Student of Rutherford B. Proposed – electron is found in specific paths or orbits 1. energy levels 2. electrons can move b/t each other (ladder pg. 129) a. based on energy absorbed or lost C. Quantum – amount of energy required to move an electron from one level to another D. Only explained hydrogen atom… A. What is it??? 1. Schrodinger – 1926 2. Based on probability (mathematically) a. Propeller blade 3. Restricts electrons to certain values or areas 4. No paths or orbits… A. Def – a region of space where there is a high probability of finding an electron. B. Energy levels (n) 1. 1, 2, 3, 4…and so on 2. each energy level can have different #’s of orbitals with different types of shapes… C. The 4 Orbital Shapes…s, p, d, f 1. s = spherical 2. p = dumbbell 3. d = cloverleaf (4 out of 5) 4. f = tough to describe *Every orbital can contain at most 2 electrons* D. When n = 1… 1. has one sublevel 1S 2. s always has 1 orbital E. When n = 2… 1. has two sublevels 2s and 2p 2. 4 orbitals total a. 2S = 1 b. 2P = 3 (Px, Py, Pz) (pg.131) -all perpendicular to each other F. When n = 3… 1. has three sublevels 3s, 3p and 3d 2. 3S = 1 3P = 3 3D = 5 orbitals 3. 9 orbitals total G. When n = 4… 1. 4S = 1 4P = 3 4F = 7 2. 16 orbitals total 4D = 5 Energy Level Number of Sublevels Type of Sublevel N=1 1 1s (1 orbital) N=2 2 2s (1 orbital), 2p (3 orbitals) N=3 3 3s (1 orbital), 3p (3 orbitals), 3d (5 orbitals) N=4 4 4s (1 orbital), 4p (3 orbitals), 4d (5 orbitals), 4f (7 orbitals)