Hatching eggs the old fashioned way

Hello

My male pekin has been humping one of my female mallards.
If I let them sit on the eggs, is it likely to hatch and turn into a duckling?

Also I have chickens in with them (just hens). How do chickens do with ducklings? Would they be mean to them?

If I can get more than a couple of ducklings I'd like to put them out on our pond. Would this upset mommy and daddy duck if they were seperated as juveniles?

Thanks

 

Oooh i love the black ones! the others look a bit freaky