AP CHEM UNIT 2 STUDY GUIDE

• It has the formula XZ₂

• It does not dissolve in water

• It contains ionic bonds

• It contains covalent bonds

• There is a partial negative charge on the H atom.

• Electrons are shared equally between the H and F atoms.

• The bond is extremely weak.

• The bond is highly polar.

• The carbon-to-selenium bond is unstable.

• The carbon-to-selenium bond is nonpolar covalent.

• The compound has the empirical formula CSe.

• A molecule of the compound will have a partial negative charge on the carbon atom.

• increasing strength of the bonds

• increasing electronegativity of the central atom

• increasing number of unshared pairs of electrons

• decreasing repulsion between hydrogen atoms

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• CH₄ < SiCl₄ < SF₄

• CH₄ < SF₄ < SiCl₄

  
  

• SF₄ < CH₄ < SiCl₄

  
  

• SiCl₄ < SF₄ < CH₄

  
  

Which of the following has the bonds arranged in order of decreasing polarity?

• H−F > N−F > F−F

  
  

• H−I > H−Br > H−F

  
  

• O−N > O−S > O−Te

  
  

• Sb−I > Sb−Te > Sb−Cl

  
  

Which of the following complete Lewis diagrams represents a molecule containing a bond angle that is closest to 120°?

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• 90*

• 109.5*

• 120*

• 180*

• 180*

• 120*

• 105*

• 90*