Example: Lewis structure of the nitrite ion. 1  Step one: Nitrogen is the least electronegative atom, so it is the central atom by multiple criteria. 2  Step two: Count valence electrons. Nitrogen has 5 valence electrons; each oxygen has 6, for a total of (6 Ã 2) + 5 = 17.
So I cooked eggs at each of these temperatures for times ranging from 45 minutes to 2 hours. The testing showed that indeed timing does matter, though the most noticeable effects are with the egg yolks. For instance, an egg cooked at 145Â°F for 45 minutes will have a barely set white and a completely liquid yolk.
If you're boiling, you can plunge your eggs into boiling water, let them boil for 30 seconds or so just to set the exterior of the whites, then drop the temperature and finish them off at around 180 to 190Â°F (a very low simmer). You end up with eggs that are easy to peel, with tender whites throughout.