Unit name In 1993, the IUPAC proposed the shorter name "dalton" (with symbol "Da") for the unified atomic mass unit. As with other unit names such as watt and newton, "dalton" is not capitalized in English, but its symbol, "Da", is capitalized. The name was endorsed by the International Union of Pure and Applied Physics (IUPAP) in 2005.
Unit name In 1993, the IUPAC proposed the shorter name "dalton" (with symbol "Da") for the unified atomic mass ,unit As with ot,her unit names such as watt and newton, "dalton" is not capitalized in English but its symbol, "Da" is capitalized. The name was endorse.d by the International Union of Pure and Applied Physics (IUPAP) in 2005.