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Chemical Bonding

Chemical Bonding. Chemical Bond. A force that holds two or more atoms together This happens because atoms prefer to have a full outer shell Atoms can share, lose, or gain valence electrons. Atoms want to be STABLE. Atoms are stable when their outer most energy level is full

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Chemical Bonding

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  1. Chemical Bonding

  2. Chemical Bond • A force that holds two or more atoms together • This happens because atoms prefer to have a full outer shell • Atoms can share, lose, or gain valence electrons

  3. Atoms want to be STABLE • Atoms are stable when their outer most energy level is full • Unstable atoms have spaces in their outer energy level • All atoms are unstable alone except for which group? • Noble Gases • Because most are unstable alone, they combine with others to become stable

  4. How do atoms Bond? • Ionic bonds • Covalent bonds • By using Lewis Dot Diagrams • Only concerned with valence electrons!! How will we represent bonds?

  5. Question • Which electrons are we concerned with during bonding?

  6. Lewis Dot Diagram Refresher • Draw the diagram for: • Beryllium • Aluminum • Tin • Bismuth • Radon

  7. Ionic Bonds • When atoms become stable by either giving or taking electrons from another atom • Most often a metal and a non-metal bond • Neutral atom- if # of protons and # of electrons are equal • Ion- an atom that has gained or lost electrons • Ions have electrical charges

  8. Question • Most of the atoms on the periodic table are neutral. (T/F) • Most of the time, which two types of elements are bonding together in an ionic bond?(metal and non-metal/ non-metal and non-metal/ metal and metal)

  9. Ions • Cation- an atom that loses electrons • Have positive charges • Na+ • Anion- an atom that gains electrons • Have negative charges • Cl- • Opposites Attract!! • Atoms with opposite charges bond together

  10. Question • What is an ion? • O ++ is an example of (anion/cation) • How/why do ionic bonds form?

  11. Covalent Bonds • When two atoms share their outer energy level by sharing a pair of electrons • Most often a non-metal and a non-metal bond • Both atoms keep their valence electrons • Charges don’t change, but they become stable

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