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.
HEAT 1/2- to 1-inch of water in a large saucepan to boiling over high heat. Carefully place steamer insert into pan over boiling water OR proceed to Step 2, if not using a steamer insert. Carefully ADD eggs using a large spoon or tongs. COVER Continue cooking 12 minutes for large eggs (13 minutes for extra large eggs). DRAIN eggs under cold running water to help the shell ease off the hard-boiled eggs. Gently TAP the large end of the egg onto a hard surface until she shell is slightly cracked and peel the egg.