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Pure Appl. Chem., Vol. 70, No. 1, pp. 237-257, 1998.


History of the recommended atomic-weight values*

TABLE 2. List of International Commission Names of Elements Selected by the Journal of the American Chemical Society and Dates of Changes in the Commission Reportsa

Years

Alb

Be

Csc

Cbd

Dy

Eu

Gle

Hf

Ho

Luf

Nb

Re

Sg

Wh

Remarksi

1903/6

um

ae

_

_

ph

tu

A, Yt

1907

um

ae

_

_

_

ph

tu

A, Sa, Yt

1908

um

ae

_

_

_

ph

tu

A, Sa

1909

um

ae

_

_

_

_

c

ph

tu

A, Sa

1910

um

ae

_

_

_

_

c

ph

tu

A, Sa, Yt

1912j

ium

ae

_

_

_

_

c

ph

tu

A, Sa, Yt

1913/7j

ium

ae

_

_

_

_

_

c

f

tu

A, Sa, Yt

WORLD WAR I

1920

um

ae

_

_

_

_

_

c

f

tu

A, Sa, Yt

1921/2

um

e

_

_

_

_

_

c

f

tu

A, Sa, Yt

1925

um

_

e

_

_

_

_

c

f

tu

A

1931/41

um

_

e

_

_

_

_

_

c

_

f

tu

A

WORLD WAR II

1947

um

_

e

_

_

_

_

_

c

_

f

tu

A

1949

um

_

e

_

_

_

_

t

_

_

f

wo

A

1951/5

um

_

e

_

_

_

_

t

_

_

f

tu

A

1961

um

_

e

_

_

_

_

t

_

_

f

tu

a Until 1961 the Commission published reports in Comptes Rendus IUPAC. Owing to that journal's limited circulation, the reports were reprinted in most countries' principal chemical publications, e.g. by Journal of the American Chemical Society, to which we here refer. After 1967 IUPAC published in Pure and Applied Chemistry which has wider circulation and is in English, so that national journals tended to abandon the practice of reprinting the Commission reports regularly. For the elements of Table 1, the only remaining departures from current nomenclature were:

i. in 1967, "cesium" for Cs was used;

ii. several changes in option or preference for calling element of symbol W (wolfram or tungsten);

iii. since 1977, the optional names of "stibium", "natrium", and "kalium" for Sb, Na, and K, respectively, were so recognized; and

iv. since 1993, the optional English names of aluminum and cesium for Al and Cs, respectively, were so recognized.

b "um" indicates that the name of aluminum was used and "ium" indicates that the name of aluminium was used.

c "ae" indicates that the spelling caesium was used and "e" indicates that the spelling cesium was used.

d Niobium was preferred in Europe, whereas columbium was used in the United States.

e Glucinum (symbol Gl) was commonly used for the element that is now universally known as beryllium.

f "c" indicates that the spelling lutecium was used and "t" indicates that the spelling lutetium was used.

g "ph" indicates that the spelling sulphur was used and "f" indicates that the spelling sulfur was used.

h Note that the element's symbol was always W; "tu" indicates that the element was named tungsten; "wo" indicates that the element was named wolfram.

i "A" for argon, in the year's reports indicated; Sa for samarium, and Yt for yttrium.

j Published in prior year. This practice seemed desirable since many commercial and scientific documents referenced the Commission-recommended atomic weights. The delay, however, in recognizing reliable new results led to the attempt after 1925 of publishing reports in the year indicated. This aim was not often achieved.

Ref. History of the recommended atomic-weight values from 1882 to 1997: a comparison of differences from current values to the estimated uncertainties of earlier values, Pure Appl. Chem., Vol. 70, No. 1, pp. 237-257, 1998.

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Comment - Conclusion - Acknowledgements - References


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