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Atomic Bonding

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  • 1. Atomic Bonding
    Page 12
  • 2. Valence Electrons
    Outer most shell of electrons
    Held loosely to an atom
    Key to all chemistry
    All atoms want to have full shells
    12
  • 3. Electron Dot Diagrams
    H
    C
    O
    Use the symbol for each element with a dot for each outer electron.
    Identify each element and the number of valence electrons that it has.
    Hydrogen
    1
    Carbon
    4
    Oxygen
    6
    13
  • 4. Magic game of
  • 5. Bonding
    I (At #53) has how many valence electrons?
    What will it do to fill its shells?
    Mg (At #12) has how many valence electrons?
    What will it do to fill its shells?
    Atoms always to the easiest thing!
    Mg will always lose 2 electrons never gain 6
    7
    Gain 1 electron
    2
    Gain 6 or lose 2 electrons
    13
  • 6. Bonding
    Where do extra electrons go?
    Where can atoms find the electrons they need?
    Atoms trade electrons = Chemical bond
    *The fewer electrons you need to trade the more reactive the atom will be!
    When atoms bond, new substances are made.
    13
  • 7. Review
    How are element represented in the periodic table?
    By symbol
    The ____________ of an element is the number of protons in the nucleus of the atom
    What is a row of elements across the table called?
    Period
    Describe how the atomic number changes across a period of elements.
    Each element increases by 1 atomic number
    atomic number
    14
  • 8. Review
    What are the elements in the same column called?
    Group or family
    Elements within a group always have the same number of
    Valence Electrons
    16
  • 9. Nonmetals
    How many valence electrons do non-metals have
    4 or more
    Describe two ways that non-metals can combine with other elements.
    Combine with metals to gain electrons
    Combine with other non-metals to share electrons
    19