Understanding Molecular Polarity

What determines if a molecule is polar?

• The even distribution of electrons

• The speed of electron movement

• The number of atoms in the molecule

• The number of protons in the molecule

Why is water considered a polar molecule?

• Because of the uneven distribution of electrons

• Because it has a symmetrical shape

• Because it has more protons than electrons

• Because oxygen is less electronegative than hydrogen

What is the shape of a sulfur difluoride molecule?

• Bent

• Trigonal planar

• Linear

• Tetrahedral

How does the shape of carbon dioxide affect its polarity?

• It makes the molecule non-linear

• It increases the electronegativity of carbon

• It causes the bond polarities to cancel out

• It makes the molecule polar

What happens when one fluorine in BF3 is replaced with chlorine?

• The bond polarities no longer cancel out

• The molecule becomes non-polar

• The bond polarities remain the same

• The molecule becomes symmetrical

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

• Check if the molecule is symmetrical

• Determine if any bonds are polar

• Identify the central atom

• Calculate the total number of electrons

What is the polarity of HCl?

• Neutral

• Symmetrical

• Polar

• Non-polar

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

• It makes the molecule non-polar

• It creates a large dipole

• It makes the molecule symmetrical

• It decreases the bond polarity

What happens to the polarity of carbon tetrafluoride when all hydrogens are replaced with fluorines?

• The bond polarities cancel out

• The bond polarities add up to a non-zero vector

• The molecule becomes polar

• The molecule becomes asymmetrical

What is the effect of symmetry on molecular polarity?

• It causes bond polarities to cancel out

• It always makes the molecule polar

• It increases the electronegativity of the central atom

• It has no effect on molecular polarity