Electron Configuration

• The electron configuration is the shorthand distribution of electrons of an atom or molecules in an atomic or molecular orbit.
• It describes each electron as moving independently in

  an orbital, in an average field created by all other orbitals.
• The number in the electron configuration corresponds to the principal quantum number.
• The letter in the electron configuration maybe any of the different sub levels-- s, p, d, f orbitals
• The superscript in the electron configuration represents the number of electrons occupying an assigned orbitals.
• Chemical behavior


  Electron configurations help us understand how atoms will

  react with each other.
• Periodic Table


  Electron configurations help us understand the structure of the

  periodic table of elements.
• Chemical bonds


  Electron configurations help us describe the chemical bonds

  that hold atoms together.
• Molecular geometry


  Electron configurations help us understand the geometries

  of molecules.
• Classification


  Electron configurations help us classify elements into different blocks, such as the s-block, p-block, d-block, and f-block. This makes it easier to study the properties of the elements as a group
• Magnetism


  Electron configurations help us understand an atom's magnetism.
• Chemical bond


  A force of attraction which holds atoms together resulting to the

  formation of compounds.
• Ionic bond


  Transfer of electrons resulting to the lost or gained of electrons.
• Cations


  Positive ions
• Anions


  Negative ions
• Ions


  Charged particle
• Lewis Electron Dot Structure


  A representation in which the symbol of the element is

  surrounded by valence electrons (represented by dots).
• Valence electron


  The outermost electron that determines the chemical properties

  of an atom; participates in chemical bonding.
• Valence shell


  The outermost energy level of an atom.
• Electron Configuration


  Distribution of electrons in the specific orbitals.
• Orbitals


  Region in space where electrons can be found (s, p, d,f).
• Aufbau


  German word which means ”building up"
• Pauli's Exclusion Principle


  No more than 2 electrons can occupy the same orbital at the

  same time; only 2 electrons with opposite spins.
• Gilbert Newton Lewis 


  • extended the application of the concept of chemical stability to the atomsof the other elements group
  • proposed the Lewis theory to explain how the elements assume the octet rule through chemical bonding
• aufbau principle