Grade 11 I.B. Chemistry Test 2 (Chapter 4)

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nathanb252
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310081
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Grade 11 I.B. Chemistry Test 2 (Chapter 4)
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2015-10-24 20:39:46
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nathan bowman chemistry mackay grade 11
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Key concepts on bonding and geometry
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  1. VSEPR theory stands for...
    Valence Shell Electron Pair Repulsion
  2. Electron pairs found in the valence shell of an atom repel each other, and thus...
    Position themselves as far apart as possible
  3. Repulsion occurs between all electron pairs, bonded and unbonded, but _____ repel more
    Unbonded electron pairs
  4. VSEPR theory treats double and single bonds as...
    A single charge center (electron domain)
  5. The geometrical arrangement of electrons is determined by...
    The number of charge centers around the central atom
  6. The shape of the molecule is determined by...
    The bonded atoms
  7. Repulsion decreases in the following order:
    • Lone Pair-Lone Pair
    • Lone Pair-Bonded Pair
    • Bonded Pair-Bonded Pair
  8. The definition of a Polar Molecule is...
    A molecule that has a polar bond and net movement of electrons to one end of the molecule
  9. Intramolecular force is...
    The attractive forces within molecules and compounds
  10. Intramolecular forces affect...
    • Geometries
    • Physical Properties
    • Reactivities
  11. Intermolecular force is...
    The attractive forces between molecules
  12. The strength of intermolecular forces determine the following physical properties of molecular compounds:
    • Physical state
    • Melting point
    • Boiling point
    • Surface tension
    • Hardness and texture
    • Solubility in various solvents
    • Enthalpy of vaporization
  13. As intermolecular forces increase...
    The compounds melting point, boiling point and surface tension also increase
  14. Van der Waals forces are...
    The weak forces of attraction between molecules, including dipole-dipole and London dispersion forces
  15. London dispersion force is...
    A weak attractive force acting between all entities caused by the temporary imbalance of electrons. The temporary shift in the electron cloud causes temporary dipole
  16. Magnitude of London dispersion force is affected by:
    • Number of electrons
    • Size of electron cloud
    • Molecular shape
  17. In a molecule, more surface contact results in...
    A higher boiling point
  18. Higher amounts of electrons results in....
    Increasesd distance to nucleus, reduced attraction of valence electrons to nucleus, electron cloud can polarize more easily
  19. The definition of a dipole-dipole force is...
    A relativly strong intermolecular force of attraction between a slightly positive end of one polar molecule and a slightly negative end of an adjascent polar molecule
  20. The definition of a hydrogen bond is...
    An unusually strong dipole-dipole force between a hydrogen atom attached to a highly electronegative and a highly electronegative atom in another molecule
  21. The strength of forces descend in the following order:
    • Ionic
    • Covalent: Hydrogen Bond>Dipole-Dipole>London Force
  22. The process of gaining electrons to form a negative anion is called...
    Reduction
  23. The process of losing electrons to form a positive cation is called...
    Oxadizing
  24. The octet rule states...
    That elements tend to lose, gain electrons or share electrons in order to achieve a noble gas electron configuration
  25. Ionic compounds have high melting and boiling points because of...
    The strong electrostatic forces of attraction between between ions in their lattice structures
  26. In order to melt an ionic solid...
    There must be enough energy to break apart electrostatic forces
  27. The definition of volatility is...
    The tendency of a substance to vapourize
  28. The definition of a covalent bond is...
    A bond where elements share electrons with each other in order to achieve the electron configuration of  noble gas
  29. Ionic bonds are formed between...
    Cations and anions
  30. Covalent bonds are formed between...
    Usually non-metals
  31. The definition of bond length is...
    The distance between 2 bonded nuclei
  32. The greater the number of shared electrons...
    The shorter and stronger the  bonds are
  33. The definition of a resonance structure is...
    When a structure can contain a double bond in more than one location without changing the arrangement of the atoms
  34. The definition of a coordinate covalent bond is...
    A covalent bond where one atom does all the sharing
  35. The definition of a non-polar covalent bond is...
    A bond between atoms with the same or insignificant differences in electronegtivities

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