Mariposa, CA. Sponsored Topics. Mariposa (formerly Logtown) is a census-designated place (CDP) in and the county seat of Mariposa County, California, United States. The population was 2,173 at the 2010 census, up from 1,373 at the 2000 census.
aÂ·tomÂ·ic. adj. 1. Of or relating to an atom or atoms. 2. Of or employing nuclear energy: an atomic submarine; atomic weapons. 3. Very small; infinitesimal. aÂ·tomâ²iÂ·calÂ·ly adv.
An element is a substance composed of identical atoms. This definition was one of the cornerstones of John Dalton's atomic theory, but it too was made obsolete by the discovery of isotopes.Atoms of the same element have different numbers of neutrons in their nuclei.n other words, all atoms of an element have the same atomic number. This modern definition resolves some sticky situations encountered with older definitions: The definition above doesn't make element and mixture mutually exclusive classifications of matter.