Cover of A Brief Account Of Radio Activity

A Brief Account Of Radio Activity

Auhtor: Francis Preston Venable

Language: english
Published: 1917

Genres:

science
Downloads: 198
eBook size: 318Kb

Review by A. Dent, May 2009


Rating: (****)
Copyright: Public Domain in the U.S.
Please check the copyright status in your country.

Summary of the Book 'A Brief Account Of Radio Activity':

A Brief Account Of Radio Activity by Francis Preston Venable. The book has no illustrations or index. Purchasers are entitled to a free trial membership in the General Books Club where they can select from more than a million books without charge.

Excerpts from the Book 'A Brief Account Of Radio Activity':


... In the electric field those negatively charged seek the positive plate and those positively charged seek the negative plate. If time is given, these ...
... chamber has two parallel plates for the application of an electric field like that already described, the ions will be carried at once to the electrodes ...
... the lens, the number of scintillations can be counted with close accuracy. A simple form of apparatus called the spinthariscope has been devised ...
... electrical methods, using electroscopes, quadrant electrometers, etc. These are the methods most used. 3. By exposure to magic and electric fields, ...
... in the examination of thorium minerals and thorium salts. Discovery of Polonium. Following up this supposition, M. and Mme. Curie set themselves ...
... at the end of several years, and radium also seemed to show no decrease in its enormous activity. Polonium, however, was found to lose most of its ...
... of the original salt. After standing a month, the separated material has lost its activity and the thorium salt has regained it. Here, again, there ...
... body. 2. That the activity of the matter so formed decreases according to an exponential law with the time from the moment of its formation. These ...
... 6.-DISINTEGRATION SERIES FOR URANIUM, ACTINIUM, AND THORIUM, AS GIVEN BY SODDY.] . Chapter Iv. Nature Of The Alpha Particle. Disintegration ...
... determine the nature of the alpha particle a crucial experiment was carried out by Rutherford and Royds, which was described as follows:. [Illustration: ...
... originally proposed by Giesel for the body now known as actinium. The calculated rate of production of helium in the series in equilibrium with ...
... will cause a serious burn on flesh exposed to it. It therefore has to be handled with care and undue exposure to the radiations must be avoided. Cancer ...
... per hour. As the emission is continuous, one gram of radium would therefore emit about 1,180,000 gram calories in the course of a year. At the end of ...
... observed, proved hard to explain. If an alpha particle in its escape from the parent atom should come within the influence of the supposed outer electrical ...
... gases, for instance, if the range in hydrogen be 1, then the range in oxygen, the atomic weight of which is 16, is only (1/16)^{1/2} or 1/4. ...
... atomic weight can usually be followed in fixing the atomic number, but where doubt exists the method just given can be resorted to. Thus ...
... of 4 units in the atomic weight of an element on the expulsion of an alpha particle is accompanied by a change of chemical properties which removes ...
... rock. Aqueous rocks have shown a lesser amount, ranging from 2.92 10^{-12} to 0.86 10^{-12} grams. As the soil is formed by the decomposition of these ...
... observation. All of this is but further evidence of the unity of matter and of forces in the universe. INDEX. Actinium, discovery of, 6. Activity, ...
... means multiplying by 0.01 10^{10} means multiplying by 10,000,000,000. 5. In this version, the subscripted text has been replaced by an underline ...