SECTION INTRODUCTION Electrons in atoms are not just spread out evenly in the space around a nucleus, but instead occupy specific energy levels or "regions" around the nucleus. To show where each electron is located, chemists draw "orbital diagrams" ADDITIONAL READING The Quantum Mechanical Model of the Atom (Tro: Introductory Chemistry-Sections 9.5-9.9) EXERCISES 1. In the space below, continue the chart below to draw a blank orbital diagram up to the 7s subshell. (The order of obitals from low to high energy can be determined by drawing a series of diagonal lines through the orbitals as shown. 3p 3d S-type subshells have just one orbital, while p-subshells have 3 orbitals, 4s 4p 4d 4 d-subshells have 5 orbitals, and f-subshells have orbitals. 5s 5p 5d 5f 6s 6p 6d 6f 7s 7p 7d 7f 3s 2p 2s ls Rev. 12/20
