If there were chicks im the eggs they are probably dead now, for chicks to hatch they need a constant temperature. Do put the chick with it's mother at night at least, they desperately need 33 to 34 degrees Celsius to survive the first three days and the temperature varies little by little each...
If your chicken isn't laying on the nest then you definitely will need a brooder like mentioned to keep the chick warm and just as soon as it has enough energy to stand on its own and move around you can put it back with it's mother at night.
If those eggs have chicks then you need to keep them...