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9th Grade Chapter 6 Lesson 2 Slideshare
 

9th Grade Chapter 6 Lesson 2 Slideshare

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    9th Grade Chapter 6 Lesson 2 Slideshare 9th Grade Chapter 6 Lesson 2 Slideshare Presentation Transcript

    • Pgs. 142-146 For Student Use Only
    • Chemical bonds are repeling forces.
      • - Chemical Bonds are the attractive forces that link atoms together.
      • Chemical bonds are determined by valence electrons.
      • Atoms tend to gain or lose electrons to get 8e- in the outermost shell
    • Covalent bonds share electrons. Ionic bonds are when opposite charges attract
    • There is more than one kind of covalent bond? Covalent Bonds: -Single- 2 atoms chare single electron - Double- 2 pairs of electrons are shared - Triple- 3 pairs of electrons are shared - Non-polar- both atoms have equal share and strength - Polar- one atom has a stronger pull on the electrons
    • What is a dipole molecule?
      • Note: - Water- has oppositely charged ends (electrons are shared more at one side than the other)
      • - HCl is also an example of covalent bonding
    • What best describes an ionic bond?
      • All of the above
      • None of the above
      • Shared Bonding
      • No charges
      • Opposites attract
    • How do atoms gain a charge?
      • Note- In order to take or lose the electrons- there must be right conditions.
      • Elements are looking to fill their shell with 8 electrons. As electrons are gained or lost charges change.
      • Opposite charges attract.
    • Is there more than one type of ionic bond?
      • Ionic Crystals- mutually attracted ions formed orderly geometric arrangements
      • Ionic compounds always combine in fixed ratios
      • The simplest ratios are called the formula unit
      • What makes all these devices work?
        • Archimedes principle- object displace a volume equal to their own.
      • What are constraints in subs and airships?
        • Subs- hull
        • Airship- altitude
      NOTE: