Understanding Molecular Polarity

What determines if a molecule is polar?

• The number of protons in the molecule

• The size of the molecule

• The speed of electron movement

• The distribution of electrons within the molecule

Why is water considered a polar molecule?

• Because it has an equal distribution of electrons

• Because oxygen pulls electrons away from hydrogen

• Because oxygen and hydrogen have the same electronegativity

• Because it has a symmetrical shape

What is the shape of a carbon dioxide molecule?

• Bent

• Linear triatomic

• Pyramidal

• Tetrahedral

How does symmetry affect the polarity of a molecule?

• Symmetry always makes a molecule polar

• Symmetry increases the electronegativity difference

• Symmetry has no effect on polarity

• Symmetry causes bond polarities to cancel out

What happens to the polarity of BF3 when one fluorine is replaced with chlorine?

• The molecule becomes non-polar

• The molecule remains the same

• The molecule becomes symmetrical

• The molecule becomes polar

What is the first step in determining molecular polarity using the flowchart?

• Check the size of the molecule

• Check if any bonds are polar

• Check if the molecule is symmetrical

• Check the speed of electron movement

What is the polarity of HCl?

• Neutral

• Symmetrical

• Polar

• Non-polar

How does substituting hydrogen with fluorine in methane affect its polarity?

• It makes the molecule non-polar

• It creates a large dipole

• It has no effect on polarity

• It makes the molecule symmetrical

What is the result when all outside atoms in a tetrahedral molecule are the same?

• The molecule becomes polar

• The bond polarities add up to zero

• The electronegativity difference increases

• The molecule becomes asymmetrical

What is the effect of changing the fourth hydrogen to fluorine in carbon tetrafluoride?

• The molecule becomes polar

• The molecule remains non-polar

• The bond polarities do not cancel

• The molecule becomes asymmetrical