A: Copper is classified as a metal on the periodic table and is therefore not classified according to family in the manner that plants and animals are. Copper is red-colored. It is malleable, ductile, and a good conductor of heat and electricity.
For a hard-boiled egg, start the egg in cold water and bring up to the boil. Once the water is gently boiling, set the timer for between 7-10 minutes depending on how well cooked you like your eggs. The longer you boil the egg, the firmer it will be. Once cooked, plunge the hard-boiled egg into plenty of cold water for one minute. Drain and cover with more cold water.
Gently lower the eggs into the water one at a time. Cook the eggs for 5 to 7 minutes: For 1 to 2 eggs, cook 5 minutes for a very runny yolk or up to 7 minutes for a barely-set yolk. For 3 or 4 eggs, add a few extra seconds to your timing. (For more than 4 eggs, cook in batches.) Remove the eggs with a slotted spoon.