Molecular solidsâ Made up of atoms or molecules held together by London dispersion forces, dipole-dipole forces, or hydrogen bonds. Characterized by low melting points and flexibility and are poor conductors. An example of a molecular solid is sucrose.
There are two main problems when it comes to hard-boiled eggs: green-gray yolks and shells that just wonât peel off. Make hard-boiled eggs headache-free by following this easy method. First, place the cold eggs in a single layer in a pan with enough cold water to cover them by about 1 inch. Then, place the pan on the stove over high heat. Shutterstock. As soon as the water comes to a boil turn the heat off, cover the pan, and remove it from the heat. Allow the eggs to sit in the water until they are cooked; about 9 minutes for a medium egg, 12 minutes for a large egg, and 15 minutes for an extra-large egg.
For soft-boiled eggs, eggwhite should be just set and yolk creamy. Variation: Medium-boiled eggs: Gently simmer for 5 minutes. Hard-boiled eggs Gently simmer for 7 minutes. Tip: To shell hard-boiled eggs, remove pan from heat.Place under running water for 1 minute. Set aside in cold water until eggs are cool enough to handle. Tap egg on side of kitchen sink to crack shell.ariation: Medium-boiled eggs: Gently simmer for 5 minutes. Hard-boiled eggs Gently simmer for 7 minutes. Tip: To shell hard-boiled eggs, remove pan from heat. Place under running water for 1 minute.