These are aluminum atoms. An atom is the smallest particle of an element that has the properties of that element. Some properties of aluminum are: shiny, silver colored, fragile, and thin. Each element has its own type of properties. Chemists use symbols to represent elements.
1 A person who has passed away and who is no longer alive is someone who would be described as dead.  When your career has faltered, you've been fired and have no hope of gaining your position back, this is an example of a time when your career is dead.
plural noun, singular die. 1. small cubes of plastic, ivory, bone, or wood, marked on each side with one to six spots, usually used in pairs in games of chance or in gambling. 2. poker dice. 3. any of various games, especially gambling games, played by shaking and throwing from two to six dice or poker dice onto a flat surface.