question archive Decide whether each molecule or polyatomic ion is polar or nonpolar
Decide whether each molecule or polyatomic ion is polar or nonpolar
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Decide whether each molecule or polyatomic ion is polar or nonpolar. If the molecule or polyatomic ion is polar, write the chemical symbol of the atom closest to the negative side. For example, if the molecule were HCI and you decided the hydrogen atom was closest to the negative side of the molecule, you'd enter "H" in the last column of the table. molecule or polar or atom closest to polyatomic ion nonpolar? negative side olo HBr polar 0 nonpolar CO, O polar 0 O nonpolar NH O polar O nonpolar X ?
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HBr polar Br
CO2 nonpolar none
NH3 polar N
Step-by-step explanation
HBr is polar since it has a electronegative difference of 0.7 Also Br is on the negative side since it more electronegative compared to H. Br = 2.8 H = 2.1
CO2 is non polar due to its linear structure, hence it also has no negative side
NH3 is polar due to its dipole which do not cancel each other. N is the negative end since it is more electronegative than H.
N = 3.04 H = 2.1
The general rule is if the difference in electronegativities is less than about 0.4, the bond is considered nonpolar; if the difference is greater than 0.4, the bond is considered polar.
