Question

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 hcl and you decided the hydrogen atom was closest to the negative side of the molecule, youd enter \h\ in the last column of the table. molecule or polyatomic ion polar or nonpolar? atom closest to negative side nh₃ polar nonpolar f₂ polar nonpolar ocs polar nonpolar

Explanation:

Step1: Analyze NH₃

NH₃ has a trigonal - pyramidal shape. Nitrogen is more electronegative than hydrogen. The bond dipoles do not cancel out, so it is polar. The more electronegative nitrogen is closest to the negative side.

Step2: Analyze F₂

F₂ is a diatomic molecule with two identical fluorine atoms. The electronegativity difference between the two atoms is 0. The bond dipoles cancel out, so it is non - polar.

Step3: Analyze OCS

OCS is a linear molecule. Oxygen is more electronegative than carbon and sulfur. The bond dipoles do not cancel out due to the difference in electronegativity of O and S, so it is polar. The more electronegative oxygen is closest to the negative side.

Answer:

molecule or polyatomic ion	polar or nonpolar?	atom closest to negative side
F₂	nonpolar
OCS	polar	O