Question

models 1, 2, and 3 are lewis dot structures for polar covalent, nonpolar covalent, and ionic molecules. which models are correctly matched to their type of bonds? a models 1 and 2 only b model 1 only c models 2 and 3 only d model 3 only

Explanation:

Step1: Analyze Model 1

The Lewis - dot structure of $\ce{Cl - Cl}$ is a non - polar covalent bond because the two chlorine atoms have the same electronegativity, so electrons are shared equally. It is mis - labeled as polar covalent.

Step2: Analyze Model 2

The Lewis - dot structure of $\ce{H - F}$ is a polar covalent bond due to the large electronegativity difference between hydrogen and fluorine. It is mis - labeled as non - polar covalent.

Step3: Analyze Model 3

The Lewis - dot structure of $\ce{Na^+Cl^-}$ is an ionic bond as it involves the transfer of an electron from sodium to chlorine, forming ions. It is correctly labeled as ionic.

Answer:

D. Model 3 only