{i} English name; John Dalton (1766-1844), famous English physicist and chemist who revived the atomic theory (namesake for the Dalton law of partial pressure); name of two cities in the United States
English chemist and physicist who formulated atomic theory and the law of partial pressures; gave the first description of red-green color blindness (1766-1844)
An atomic mass unit A unit of mass that equals 1/12 the mass of the most abundant isotope of carbon (12C), which is assigned a mass of 12 dark line - The absence of a given wavelength or set of wavelengths in a continuum spectrum