chemistry

given the following electronegativities Na=0.9, H=2.1, Cl=3.0 which of the following statements is true?

H2,Cl2, and HCl are polar covalent molecules

NaCl is a polar covalent compound and HCl is an ionic compound

HCl is a nonpolar covalent compound and Cl2 is a polar covalent molecule

Cl2 is a nonpolar covalent molecule and HCl is a polar covalent molecule

please explain why. I am having a hard time comprehending this stuff
thanks

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  1. Subtract to obtain the delta EN. Delta EN of about 1.8 or so is about 50/50.

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  2. cfsfa

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  3. Cl2 is nonpolar and HCl is polar because electronegative increases form left to right and decreases going down the periodic table.Also,Cl2 is diatomic and diatomics are nonpolar.

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