Roseville (formerly, Roseville Junction, Junction, and Grider's) is the largest city in Placer County, California, United States, located in the Sacramento metropolitan area. As of January 1, 2015 the State Department of Finance estimated the City's population to be 128,382.
These types of crystals are made up of small molecules that hold themselves together using weak electrical forces. There is also quite a bit of space between these small molecules. These types of crystals have low melting points and are good insulators. Diamonds. Diamonds are a good example of a crystal that is made up of large molecules. They are created from a large molecule that is put together in three dimensions. Diamonds are made only of carbon atoms, and each carbon atom is bonded to four other carbon atoms that are at equal distance to each other and are grouped around it.
Crystal: any solid material whose atoms are organized in a repeated pattern of one of four types: covalent, ionic, metallic and molecular. Covalent crystal: the atoms share electrons; diamond ; Ionic crystal: the atoms are drawn together by opposite charges; table salt ; Metallic crystals: atoms are metal elements; gold nuggets