พบกับเราที่ facebook  

   
Radioactive Change Of Radon

Radioactive Change Of Radon

The property of intrinsic luminosity is characteristic of radon in all states of aggregation, and is one evidence of the energy changes which accompany its disintegration. The intensity of the phosphorescence is greatest in the solid - probably because of the lesser quantity occupied - however both the gas and the liquid glow strongly. The color of the light emitted by the strong varies from metal-blue on the melting-point to orange-red at lower temperatures. Heat is also given out throughout the disintegration of the emanation.

The continual emission of energy is also shown by the gradual decomposition of carbon dioxide, carbon monoxide, ammonia, hydrochloric acid, and water uncovered to the action of radon. It has also been stated that when solutions of compounds of the weather of the carbon group (silicon, titanium, zirconium, thorium, and lead) are subjected to the motion of radon, carbon dioxide is always produced. This suggests a chance that there may be a breaking-down of the molecules of those elements with formation of carbon, the lowest member of the series. Radon will cause the oxidation of wet mercury, and turns atypical white glass violet.

It was at one time supposed that a change of copper into lithium and of water into neon had been observed, but the validity of these observations is seriously open to question.

For one or days after its isolation radon undergoes a sluggish contraction to about one-half its original quantity; afterwards it slowly expands to about three to 3.5 times the original volume. This change corresponds to a change in the spectrum, that of radon disappearing utterly after 3-4 days, and giving place to that of helium.

The cause of the contraction is obscure, but it surely has been noticed in every pattern hitherto prepared, and is, maybe, because of impurities. The sluggish enlargement which takes place afterwards could also be satisfactorily defined on the speculation that the α-particles given out during the radioactive change of the radon have such a high velocity that they are forced into the partitions of the containing vessel and are only evolved once more fairly slowly. It has been discovered that if radon is confined in a glass tube the partitions of which have a thickness less than the range of its a-particles in glass, an accumulation of helium may be noticed in the outer space. This helps the preceding rationalization of the sluggish improve in volume, and additional proves conclusively the identity of the helium atom with the α-particle. The period of half-change of radon is 3.seventy five days.

It may be mentioned right here that the evolution of helium from radium was first proved by Ramsay and Soddy, and confirmed by Himstedt and Meyer: the statement that the radioactive parts are parts undergoing decomposition was first made by Geoffrey Martin. Assuming that 5 α-particles are expelled during the full disintegration of one atom of radium, the amount of helium produced per day from 1 gram of radium ought to be 0.439 cu. mm. at N.T.P.: experimental determinations of the amount have given figures in good agreement with this result. Since then its production throughout many different radioactive modifications has been observed.

If you liked this write-up and you would such as to get additional info pertaining to Visit Website kindly go to our own web site.
   

QR-Code  

 แบบสอบถามความพึงพอใจ
 ของผู้ปกครอง
ต่อกิจกรรม
 เยี่ยมบ้านนักเรียน ปี2562

--------------------------------------------------------

แบบสอบถามความพึงพอใจ
ค่ายเสริมสร้างทักษะชีวิต
"ปลุกพลัง KID พิชิตเพื่อป้องกันยาเสพติด
และพฤติกรรมที่ไม่พึงประสงค์"

   
© Copyright 2013