CHAPTER 1

    Cards (14)

    • Electronic Configuration

      Arrangement of electrons in orbitals
    • Rules for Electronic Configuration

      • Aufbau principle
      • Pauli Exclusion principle
      • Hund's rule
    • Aufbau principle

      Electrons should occupy the orbital with the lowest energy first before it enters the ones with higher energy
    • Pauli Exclusion principle
      No two electrons in the same atom can have the same four quantum number
    • Hund's rule
      When electrons are added to the orbital of equivalent energy, each orbital are filled single with electron of the same spin first before it is paired
    • Electropositive elements
      Give electrons during chemical reactions to form cations
    • Electronegative elements

      Accept electrons during chemical reactions
    • Electronegativity
      Measure of the ability of an atom in a molecule to attract the bonding electrons to itself
    • Electronegativity increases across a period and decreases down a group
    • Factors affecting electronegativity
      • Atomic size
      • Effective nuclear charge
    • Iron (Fe)
      Atomic number 26
    • Electronegativity
      The measure of the ability of an atom in a molecule to attract the bonding electrons to itself
    • Electronegativity
      • Increases as we move across a period
      • Decreases descending (move down) a group
    • Factors affecting electronegativity
      • Atomic size
      • Effective nuclear charge
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