Dalton

The dalton (symbol Da) is the immediate predecessor of the atomic mass unit. It is named after John Dalton in recognition of his achievement in introducing the atomic hypothesis into chemistry. Whereas the unified atomic mass unit is defined as 1/12 of the mass of a single atom of ¹²C, the dalton was defined as 1/16 of the mass of an atom of oxygen (which turned out to be a mixture of ¹⁶O, ¹⁷O and ¹⁸O in a 3150:1:5 ratio with mean atomic mass number of 16,0035).

Dalton is also a placename in the United Kingdom:

Dalton is also a placename in the United States of America:

Dalton, New York

The Dalton Trail is an old Tlingit trail, whereas the Dalton Highway is a road through Alaska.

Notable people whose surname is or was Dalton (with entries in Wikipedia):

Dalton, Emmett (1861-1937), U.S. outlaw, member of the Dalton Gang
Dalton, Hugh, Baron Dalton (1887-1962), British politician
Dalton, John (1766-1844), British physicist and chemist
Dalton, John M (1900-1972), U.S. politician
Dalton, John N (1931-1986), U.S. politician
Dalton, Jon, U.S. wrestler ("Jonny Fairplay")
Dalton, Richard (born 1979), Canadian canoeist
Dalton, Rick, Canadian politician
Dalton, Timothy (born 1946), Welsh actor
Dalton, Tristram (1738-1817), U.S. politician
Dalton, Walter H, U.S. politician
Other uses
Dalton's law of partial pressure, named after John Dalton
DALTON, a computer program in quantum chemistry, named after John Dalton
The Dalton Plan, an educational concept
The Dalton School, a private school in New York City, New York
The Dalton Gang, an infamous outlaw group in the old West
The fictional Dalton Brothers, cousins of the Dalton Gang in the Lucky Luke comic books

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