![]() It is my earnest desire that some of you shouldĬarry on this scientific work and keep for your ambition the determination Left to experimentation and I hope that we may have some beautiful progress We knowĪlso radioactive gases, named emanations. The polonium, the mesothorium, the radiothorium, the actinium. ![]() Many having other radio-elements are known already, Which are not stable, as was believed before, but may undergo spontaneous That is, as you see, a theory of transformation of atoms In that way it has been proved that the radioactive elements are constantlyĭisintegrating and that they produce at the end ordinary elements, principally ![]() We know that the atoms of radium are destroyedīy expulsion of these particles, some of which are atoms of helium. We know that particles are expelled from radium with a very great velocity The properties of the rays have been studied very closely. The radium a benefit for humanity.The scientific history of radium There is always the chance that a scientific discovery may become like It must be done for itself, for the beauty of science, and then Work must not be considered from the point of view of the direct usefulness When radium was discovered no one knew that it would prove useful in hospitals. The radium is more than a hundred thousand times dearer than Still very high because the quantity of radium contained in the ore is And so a factory of radium was started to begin with in France,Īnd later in America where a big quantity of ore named carnotite is available.Īmerica does produce many grams of radium every year, but the price is Utilization of radium makes it necessary to get that element in sufficient Is considered particularly important is the treatment of cancer. Good results have been obtained in many cases. These effects may be used for the cure of Property of the rays is the production of physiological effects on theĬells of the human organism. If we take a practical point of view, then the most important And the effects of the rays make the radium so Radium is in the intensity of its rays which several million times greater Separated in a pure state.Now, the special interest of But the most important is radium, which could be We thought it would beĭone in several weeks or months, but it was not so. And I wanted to find and to separate that element,Īnd I settled to that work with Professor Curie. Oxides which are almost entirely composed of these elements.Then I thought that there shouldīe in the minerals some unknown element having a much greater radioactivity But then the activity was not what I couldĮxpect, it was greater than for uranium or thorium compounds like the Of minerals and I found that several of those which contain uranium or ![]() The greater the activity, the activity being an atomic property of theĮlements, uranium and thorium.Them I took up measurements Proportion to their uranium or thorium content. Asįor the uranium and thorium compounds, I found that they were active in So I took up a work about all known elements, and their compounds andįound that uranium compounds are active and also all thorium compounds,īut other elements were not found active, nor were their compounds. ![]() To know if there were other elements, giving out rays of the same kind. The way of making good measurements of the uranium rays, and then I wanted Years before by Professor Becquerel.I spent some time in studying I was engaged in some work on uranium rays which had been discovered two School of Physics and Chemistry where Professor Curie held his lectures. Professor Curie and I worked at that time in the laboratory of the Is always of interest to remember them and to explain them.ġ897. Radium is no more a baby, it is more than twenty years old,īut the conditions of the discovery were somewhat peculiar, and so it But as weĬan not do that, I shall only give you a short account of my early workĪbout radium. Vassar College in Poughkeepsie, NY - May 14, 1921Ībout radium and radioactivity and it would take a long time. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |