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.
Hereâs Barbâs tip: Hereâs a way to prepare lots of hard boiled eggs without having to work with big pots of water, bake them right in the oven! Put a baking sheet on the bottom of the oven then place all the eggs you need cooked directly on the rack, the baking sheet will catch any broken ones for easy cleanup. Iâve never had one break yet but this is just in case. Bake them at 325Â°F. for half an hour (do not preheat).