Definition of atom. 1  1a : the smallest particle of an element that can exist either alone or in combination an atom of hydrogenb : the atom considered as a source of vast potential constructive or destructive energy â¦ a largely forgotten legacy of this country's conquest of the atom.
The mountain, a part of the Cascade Range, is a volcano that has not erupted for 2,000 years. It is also the highest mountain in the state of Washington. English explorer George Vancouver named Mount Rainier in honor of another navigator, Peter Rainier. Some people, however, prefer to call the mountain by its Indian name, Mount Tacoma.
Fun Mount Baker Facts: After Mount Rainier, Mount Baker is the most heavily glaciated mountain in the Cascades. Mount Baker was first climbed in 1898 by Edmund T. Coleman and his party. Mount Baker is the second most active volcano in Cascade Mountain Range, although it's last eruption was in 1880. Mount Baker is the third-highest mountain in Washington, and the fifth-highest mountain in the Casades. There are ten main glaciers on Mount Baker.