large/12904/worldswithinworlds_v1-3_1904_librivox_64kb_mp3/worldswithinworlds_01_asimov_64kb_101
large/12904/worldswithinworlds_v1-3_1904_librivox_64kb_mp3/worldswithinworlds_01_asimov_64kb
English
12904
The only trouble was that every once in a while an alpha particle seemed to strike something in the gold film and bounce to one side. THE ONLY TROUBLE WAS THAT EVERY ONCE IN A WHILE AN ALPHA PARTICLE SEEMED TO STRIKE SOMETHING IN THE GOLD FILM AND BOUNCE TO ONE SIDE
lectrons had been added. [Illustration: ] Neutral atom Each unit of positive charge is balanced by a unit of negative charge In this case, total charge = +2 -2 = 0 Ionized atom: If an electron is removed, the balance is destroyed In this case, total charge = +2 -1 = +1 Although Thomson’s model of the atom explained the existence of ions and the fact that atoms could give off electrons or absorb them, it was not satisfactory in all ways. Further investigations yielded results not compatible with the raisins-in-the-pound-cake notion. In 1906 Rutherford began to study what happened when massive subatomic particles, such as alpha particles, passed through matter. When alpha particles passed through a thin film of gold, for instance, they raced through, for the most part, as though nothing were there. The alpha particles seemed to push the light electrons aside and to act as though the positively charged main body of the atom that Thomson had pictured was not solid, but was soft and spongy. ON SEEMED CORRECT THERE WERE POSITIVE IONS MADE UP OF ATOMS OR GROUPS OF ATOMS FROM WHICH ONE OR MORE OF THE ELECTRONS WITHIN THE ATOMS HAD BEEN REMOVED THERE WERE NEGATIVE IONS MADE UP OF SINGLE ATOMS OR OF GROUPS OF ATOMS TO WHICH ONE OR MORE EXTRA ELECTRONS HAD BEEN ADDED ALTHOUGH THOMPSON'S MODEL OF THE ATOM EXPLAINED THE EXISTENCE OF IONS AND THE FACT THAT ADAMS COULD GIVE OFF ELECTRONS OR ABSORB THEM IT WAS NOT SATISFACTORY IN ALL WAYS FURTHER INVESTIGATIONS YIELDED RESULTS NOT COMPATIBLE WITH THE RAISINS IN THE POUND CAKE NOTION IN NINETEEN O SIX RUFFORD BEGAN TO STUDY WHAT HAPPENED WHEN MASSIVE SUB ATOMIC PARTICLES SUCH AS ALPHA PARTICLES PASSED THROUGH MATTER WHEN ALPHA PARTICLES PASSED THROUGH A THIN FILM OF GOLD FOR INSTANCE THEY RACED THROUGH FOR THE MOST PART AS THOUGH NOTHING WERE THERE THE ALPHA PARTICLES SEEMED TO PUSH THE LIGHT ELECTRONS ASIDE AND ACT AS THOUGH THE POSITIVELY CHARGED MAIN BODY OF THE ATOM THAT THOMPSON HAD PICTURED WAS NOT SOLID BUT WAS SOFT AND SPONGY
large/12904/worldswithinworlds_v1-3_1904_librivox_64kb_mp3/worldswithinworlds_01_asimov_64kb
file
download/librilight/large/12904/worldswithinworlds_v1-3_1904_librivox_64kb_mp3/worldswithinworlds_01_asimov_64kb.flac