Using your general knowledge of periodic trends in electronegativity, predict whether the C=O bond and the C-H bonds in formaldehyde will be strongly polar, weakly polar or nonpolar.  Calculate the electronegativity difference ΔχO-C across the C=O bond and the electronegativity difference ΔχC-H to confirm or correct your predictions. For any strongly polar bond(s) on the molecule, draw the bond dipole moment adjacent to the bond in the VSEPR structure above, using crossed arrow notation to show the direction of the positive and negative bond dipoles.  Predict whether the overall molecule should be polar or nonpolar.

Using your general knowledge of periodic trends in electronegativity, predict whether the C=O bond and the C-H bonds in formaldehyde will be strongly polar, weakly polar or nonpolar. 

Calculate the electronegativity difference Δχ_O-C across the C=O bond and the electronegativity difference Δχ_C-H to confirm or correct your predictions.

For any strongly polar bond(s) on the molecule, draw the bond dipole moment adjacent to the bond in the VSEPR structure above, using crossed arrow notation to show the direction of the positive and negative bond dipoles. 

Predict whether the overall molecule should be polar or nonpolar. ___________________ Explain your reasoning below. If the overall molecule is polar, draw the net dipole next to the molecule, using crossed arrow notation to indicate the direction of the dipole.