it usually takes 24 days
The egg came first... kind of. Basically, a long, long time ago two birds that weren't really chickens created the first chicken egg.
because of some compounds and materials the egg form inside the chicken
The egg, 1st of all because there were eggs long before birds, but if you mean a chicken's egg then it is still the egg. This is because when a new species evolves, the egg is say, given birth to a sub-chicken, and the new species (chicken) is inside the egg, which is techically now a chicken's egg.
Nothing, as long as it is not rotten, it is just like eating a chicken egg. A chicken is a bird.
No, a chicken egg is not sperm. An egg is a female reproductive cell that is fertilized by a male sperm cell to form an embryo. In the case of a chicken egg, the yolk and the white are parts of the egg that provide nutrients and protection for the embryo to develop.
a week
The egg. Dinosaurs laid eggs long, long before chickens existed.
It takes 21 days for a chicken egg to hatch.
30 Min
the beak starts to form on the second day of incubation
About 2-3 weeks
An unfertilized chicken egg that is not collected and refrigerated will eventually start to decay. You can put the egg in a glass of water, if it sinks to the bottom then it is still fresh.