Will store bought chicken eggs hatch? I'm a bit scared to try it, because I'm not sure what would be worse--cracking open a rotten egg, or having to figure out what to do with a chick.

So how about it?  If I leave chicken eggs out, will they eventually hatch if kept at the right temperature?

EDIT - Sorry for the confusion.  I was referring to store bought eggs only.
If you're getting your eggs from a supermarket, they won't hatch. This is the case with eggs you get for eating from almost any source.

Hens lay eggs even if they haven't been, umm, mating with a male. Any egg laid in those circumstances will never hatch because it's unfertilized, and that's the standard practice for any commercial egg operation.

Now if you have a free ranging hen and a rooster too, and they're not kept apart, then yeah, you could get a fertilized egg. And that egg needs to be kept properly warm to hatch.