This is a chemical change.
yes it is a slow change since the egg reacts slowly to give boiled egg.
No the volume of the egg shell doesn't
No the volume of the egg shell doesn't
a boiled egg
No, boiling doesn't change the shell.
Then same size as the raw egg that was boiled.
Yes. hard-boiled egg
No it does not have to be raw or boiled fo rthe egg to float!
The density of an egg that I boiled was 1.02 * density of tap water. The density of a raw egg was 1.06 * the density of tap water. The mass of the egg did not change so the volume increased slightly. With a raw egg and a boiled egg covering in water, if you add salt and mix slowly you find that the boiled egg will float first and if you continue to add salt you get both to float. Interestingly, recipes for making a brine solution for food preparation frequently tell you to put a raw egg in water and add enough salt in solution to make the egg float. This assures enough salt for a good brine solution.
Boiled egg
No. When an egg is boiled anything living in or on it is killed.
A boiled egg will float in salt water.