9th Grade Chapter 6 Lesson 2 Slideshare

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  • 1. Pgs. 142-146 For Student Use Only
  • 2. 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
  • 3. Covalent bonds share electrons. Ionic bonds are when opposite charges attract
  • 4. 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
  • 5. 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
  • 6. What best describes an ionic bond?
    • All of the above
    • None of the above
    • Shared Bonding
    • No charges
    • Opposites attract
  • 7. 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.
  • 8. 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
  • 9.
    • 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