Boltwood, Bertram Borden


Boltwood, Bertram Borden

▪ American chemist and physicist
born July 27, 1870, Amherst, Mass., U.S.
died Aug. 15, 1927, Hancock Point, Maine

      American chemist and physicist whose work on the radioactive decay of uranium and thorium was important in the development of the theory of isotopes.

      Boltwood was a member of the Yale faculty from 1897 until 1900, when he established a consulting firm of mining engineers and chemists in partnership with the American chemist Joseph Hyde Pratt. Boltwood grew interested in radioactivity and, in 1904, showed that many of the radioactive elements decay into other radioactive elements. He discovered ionium, now called thorium-230. In 1905 he proposed that lead is the final decay product of uranium and two years later developed a method of determining the age of some rocks by measuring the ratio of lead and uranium. Additional methods of radiometric dating that followed revolutionized estimates of the age of Earth and proved invaluable in archaeology.

      In 1910 Boltwood became professor of radiochemistry at Yale University. Overwork led to a nervous breakdown, and intermittent depression culminated in his suicide.

* * *


Universalium. 2010.

Look at other dictionaries:

  • Boltwood , Bertram Borden — (1870–1927) American chemist and physicist Boltwood, the son of a lawyer, was born in Amherst, Massachusetts, and educated at Yale and the University of Munich. Apart from the period 1900–06, when he served as a private consultant, and the year… …   Scientists

  • Bertram B. Boltwood — Bertram Borden Boltwood (* 27. Juli 1870 in Amherst, Massachusetts, USA; † 14./15. August 1927 in Hancock Point, Maine (durch Selbstmord)) war ein US amerikanischer Radiochemiker. Leben und Wirken Bertram Boltwood studierte ab 1889 Chemie in Yale …   Deutsch Wikipedia

  • Bertram Boltwood — Bertram Borden Boltwood (né le 27 juillet 1870 à Amherst, Massachusetts, mort le 15 août 1927 à Hancock Point, Maine) est un radiochimiste américain. Il a établi que le plomb était l élément final de la famille radioactive de l uranium (celle de… …   Wikipédia en Français

  • Bertram Boltwood — Bertram Borden Boltwood (* 27. Juli 1870 in Amherst, Massachusetts, USA; † 14./15. August 1927 in Hancock Point, Maine (durch Selbstmord)) war ein US amerikanischer Radiochemiker. Leben und Wirken Bertram Boltwood studierte ab 1889 Chemie in Yale …   Deutsch Wikipedia

  • Bertram Boltwood — Infobox Scientist name = PAGENAME box width = image width =150px caption = PAGENAME birth date = July 27, 1870 birth place = Amherst, Massachusetts death date = 1927 death place = Hancock Point, Maine) residence = citizenship = nationality =… …   Wikipedia

  • Rutherford, Ernest, Baron Rutherford of Nelson, of Cambridge — ▪ British physicist Introduction born Aug. 30, 1871, Spring Grove, N.Z. died Oct. 19, 1937, Cambridge, Cambridgeshire, Eng.  New Zealand born British physicist considered the greatest experimentalist since Michael Faraday (Faraday, Michael)… …   Universalium

  • Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry       The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …   Universalium

  • geochronology — geochronologic /jee oh kron l oj ik/, geochronological, adj. geochronologist, n. /jee oh kreuh nol euh jee/, n. the chronology of the earth, as based on both absolute and relative methods of age determination. [1890 95; GEO + CHRONOLOGY] * * *… …   Universalium

  • Болтвуд, Бертрам — Бертрам Болтвуд (англ. Bertram Borden Boltwood; 27 июля 1870, Амхерст, США  15 августа 1927, Хэнкок, США)  американский учёный. Проходил стажировку в Англии у Эрнеста Резерфорда. Доказал, что радий является продуктом распада урана …   Википедия

  • List of named asteroids (A-C) — A List of named asteroids ordered alphabetically from A to C.See also: *List of named asteroids (D E) *List of named asteroids (F H) *List of named asteroids (I K) *List of named asteroids (L N) *List of named asteroids (O R) *List of named… …   Wikipedia


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.