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Electron Configuration. Chapter 5: Atomic Structure Section 5.3. Quantum States and Orbitals. Quantum state = a specific combination of values of variables such as energy and position that is allowed by quantum theory .

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electron configuration

Electron Configuration

Chapter 5: Atomic Structure

Section 5.3

quantum states and orbitals
Quantum States and Orbitals
  • Quantum state = a specific combination of values of variables such as energy and position that is allowed by quantum theory.
  • We group electrons into different quantum states to describe their electron arrangement.
quantum states and orbitals1
Quantum States and Orbitals
  • There are 4 shapes associated with quantum states: s, p, d, and f.
  • Orbitals hold electrons, and show the area in which the electrons can be found.
  • S orbitals can hold 2 electrons
  • P orbitals can hold 6 electrons
  • D orbitals can hold 10 electrons
electron configurations
Electron Configurations
  • Electron configuration = a description of which orbitals contain electrons for a particular atom.
finding electron configuration
Finding Electron Configuration
  • The complete list of orbitals and the order in which they fill for all of the currently discovered elements is:

1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p

  • The order tells a chemist exactly how the electrons are structured in an atom.
book work
Book Work
  • Read pages 148-159.
  • Answer questions 43, 49, 52-54, 56, 58, 62.
  • Find the electron configurations for Calcium, Bromine, and Tungsten.
arrow notation
Arrow Notation
  • We have learned the long method of writing out electron configuration.
  • We can also write electron config. using the box and arrow method.
hund s rule of maximum multiplicity
Hund\'s rule of maximum multiplicity
  • When more than one orbital of equal energies are available then the electrons will first occupy these orbitals separately with parallel spins.
  • The pairing of electrons will start only after all the orbitals of a given sub level are singly occupied.
For example, the three electrons that are filled into the three \'p\' orbitals can be represented in two different ways: