रेडियम

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is lekh ka punarikshan evan sampadan hona avashyak hai. ap isamean sahayata kar sakate haian. "sujhav"

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rediyam avart sarani ke dvitiy mukhy samooh ka aantim tatv hai. rediyoaiktiv tatvoan mean isaka mukhy sthan hai. isake anek rediyoaiktiv samasthanik milate haian, jinamean 226 dravyaman sankhya ka samasthanik sabase sthir hai.

rediyam ki khoj piyare kyoori tatha shrimati kyoori ne 1898 ee. mean ki thi. yooreniyam ayask, pichableand, ki rediyoaiktivata vishuddh yooreniyam se adhik hoti hai. uparyukt donoan vaijnanikoan ne rasayanik kriyaoan dvara adhik rediyoaiktiv vale aansh ko pichableand se alag kar is tatv ki upasthiti siddh ki thi. 1902 ee. mean isaka vishuddh yaugik bana aur 1910 ee. mean rediyam dhatu ka nirman hua.

yooreniyam ayaskoan ke sath rediyam sada mishrit rahata hai. yooreniyam rediyoaiktiv tatv hai. isi kriya dvara rediyam ki utpatti hoti hai, parantu rediyam ka, svayan rediyoaiktiv hone ke karan, kshay bhi hota rahata hai. is karan yooreniyam ayask mean rediyam ki matra vastut: sthir rahati hai. isake atirikt thoriyam ayask bhi isaka srot hai. samudr tatha usaki nichali satah aur kuchh nadiyoan ke jal mean bhi isaki sookshm matra milati hai.

pichableand ayask mukhyat: aphrika mean kaango ke kataianga praant mean tatha kainada aur pashchim amarika mean milata hai. isake atirikt yoorop ke kuchh sthanoan mean, dakshini aphrika, aaustreliya tatha maidagaskar mean bhi isake ayask milate haian. bharat ke keral rajy mean monojait ayask bahut matra mean prapy hai. isase rediyam ka doosara samasthanik, jise mizothoriyam kahate haian, milata hai. yah adhik asthayi roop ka samasthanik hai.

panne ki pragati avastha

adhar

prarambhik

madhyamik

poornata

shodh

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sanbandhit lekh

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