Water molecules are polar molecules. What is meant by the term polar molecule?

a molecule that has an overall positive charge on one end and an overall negative charge on the other end
a molecule that has no charge on one end and either an overall negative or positive charge on the other end
a molecule that has an overall negative charge on one end, as well as an overall negative charge on the other end
a molecule that has an overall positive charge on one end, as well as an overall positive charge on the other end

Question

Water molecules are polar molecules. What is meant by the term polar molecule?
 	
	a molecule that has an overall positive charge on one end and an overall negative charge on the other end
	a molecule that has no charge on one end and either an overall negative or positive charge on the other end
	a molecule that has an overall negative charge on one end, as well as an overall negative charge on the other end
	a molecule that has an overall positive charge on one end, as well as an overall positive charge on the other end

anonymous · Answer

this is mathematics you'll have better luck in biology

butterflydreamer · Answer

This is actually a chemistry question haha. 
But polar molecules have a positive and negative charged end because of electronegativity. 
:)