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The Interpretation of Radium and the Structure of the Atom

The Interpretation of Radium and the Structure of the Atom


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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1922 Excerpt: ...Within narrow limits the average life of radium may be taken to be 2,500 years. The Total Energy Evolved In The Complete Disintegration Of Radium. A knowledge of this important constant enables us at once to say how much energy any quantity of radium would evolve in the course of its complete change--that is, during a period of some thousands of years. We saw (p. 22) that a gram of pure radium evolved about 133 calories of heat per hour. There are 8,760 hours in the year, so that in a year a gram of radium evolves about 1,160,000 calories. In a year 1 2500th part changes. Therefore in the complete change of one gram of radium no less than 2,900,000,000 calories would be evolved. The energy evolved in the change of radium is nearly a million times greater than that evolved from a similar weight of matter undergoing any change known previously to the discovery of radioactivity. By the burning of a gram of coal, for example, only about 8,000 calories are obtained. In this change, however, 2 grams of oxygen are also consumed, so that per gram of the two substances taken together the heat evolved is only 2,200 calories. On this basis of calculation the energy of radium is well over a million times that furnished from the combustion of coal. No wonder then that to account for the boundless energy displayed everywhere in the starry heavens proved a difficult problem for physicists, acquainted with no more energetic chemical process than the burning of coal! CHAPTER VIII THE ORIGIN OF RADIUM Why Has Radium Survived? One of our chief duties will be to follow out this theory of the disintegration of atoms in radioactivity. The bare idea of elements spontaneously changing raises so many obvious and apparently insurmountable difficulties that it will be interesti...


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Product Details
  • ISBN-13: 9781153824415
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 78
  • Spine Width: 4 mm
  • Width: 189 mm
  • ISBN-10: 1153824418
  • Publisher Date: 01 May 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 154 gr


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