what are polar and non polar molecules?

 Polar molecules have an unequal sharing of electrons, creating partial positive and negative charges (a "net dipole"). Nonpolar molecules share electrons equally or have symmetrical shapes that perfectly cancel out any charge differences. This key difference determines how substances dissolve, mix, and react. 

Common Polar Molecules

These molecules feature asymmetrical shapes or lone pairs of electrons that cause an uneven pull. [1, 2]

• Water (\(H_{2}O\))
• Ammonia (\(NH_{3}\))
• Hydrogen Fluoride (\(HF\))
• Sulfur Dioxide (\(SO_{2}\))
• Hydrogen Chloride (\(HCl\))
• Ethanol (\(C_{2}H_{5}OH\))
• Carbon Monoxide (\(CO\))
• Acetone (\(CH_{3}COCH_{3}\)) 

Common Non-Polar Molecules

These molecules typically have a symmetrical geometry, causing the pulls of individual atoms to cancel each other out.

• Oxygen Gas (\(O_{2}\))
• Carbon Dioxide (\(CO_{2}\))
• Methane (\(CH_{4}\))
• Nitrogen Gas (\(N_{2}\))
• Benzene (\(C_{6}H_{6}\))
• Carbon Tetrachloride (\(CCl_{4}\))
• Hexane (\(C_{6}H_{14}\))
• Hydrogen Gas (\(H_{2}\)) 

Key Differences

Feature	Polar Molecules	Nonpolar Molecules
Electron Sharing	Unequal (electrons spend more time near the more electronegative atom).	Equal (electrons are shared evenly across the atoms).
Symmetry	Asymmetrical.	Symmetrical.
Charge	Has distinct positive and negative ends (poles).	No distinct positive or negative ends.
Common Examples	Water (\(H_{2}O\)), Ammonia (\(NH_{3}\)), Hydrochloric Acid (\(HCl\)).	Carbon Dioxide (\(CO_{2}\)), Methane (\(CH_{4}\)), Oxygen gas (\(O_{2}\)).