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Bond Angles (Simplified) quiz

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  • What is a bond angle in a molecule?
    A bond angle is the angle formed by two adjacent atoms with a central atom in between.
  • How does the presence of lone pairs on the central atom affect the bond angle?
    Lone pairs decrease the ideal bond angle, causing it to be less than the optimal value.
  • What is the ideal bond angle for a molecule with two electron groups and no lone pairs?
    The ideal bond angle is 180 degrees when there are two electron groups and no lone pairs.
  • What is the ideal bond angle for three electron groups with no lone pairs?
    The ideal bond angle is 120 degrees for three electron groups with no lone pairs.
  • How does the bond angle change when there is one lone pair among three electron groups?
    The bond angle decreases and becomes less than 120 degrees when there is one lone pair.
  • What is the ideal bond angle for four electron groups with no lone pairs?
    The ideal bond angle is 109.5 degrees for four electron groups with no lone pairs.
  • How does the bond angle change with one lone pair among four electron groups?
    The bond angle decreases and becomes less than 109.5 degrees when there is one lone pair.
  • What happens to the bond angle when there are two lone pairs among four electron groups?
    The bond angle decreases even further and is less than 109.5 degrees.
  • Why do lone pairs cause bond angles to decrease?
    Lone pairs occupy more space and increase repulsion, pushing bonding atoms closer together and reducing the bond angle.
  • What is meant by 'ideal bond angle'?
    An ideal bond angle is the optimal angle that minimizes repulsion between atoms when there are no lone pairs.
  • How can bond angles help differentiate molecules with the same number of electron groups?
    Bond angles can vary depending on the presence of lone pairs, helping to distinguish between different molecular shapes.
  • What is the bond angle for a linear molecule with two electron groups?
    The bond angle is 180 degrees for a linear molecule with two electron groups.
  • What is the bond angle for a trigonal planar molecule with three electron groups and no lone pairs?
    The bond angle is 120 degrees for a trigonal planar molecule with three electron groups and no lone pairs.
  • What is the bond angle for a tetrahedral molecule with four electron groups and no lone pairs?
    The bond angle is 109.5 degrees for a tetrahedral molecule with four electron groups and no lone pairs.
  • How does increasing the number of lone pairs affect the bond angle?
    Increasing the number of lone pairs further decreases the bond angle from its ideal value.