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  • tellurium (Te). Alkaline earth metals - group 2: beryllium (Be) through radium (Ra). Alkali metals - group 1: lithium (Li) through francium (Fr). Body-centered
    18 KB (1,722 words) - 02:35, 1 February 2016
  • potassium, uranium and thorium and their decay products, some of which, like radium and radon are intensely radioactive but occur in low concentrations." "An
    23 KB (2,136 words) - 19:35, 12 February 2016
  • francium (Fr). Alkaline earth metals - group 2: beryllium (Be) through radium (Ra). Aluminides - aluminum (Al): native aluminum and minerals above 25
    15 KB (1,547 words) - 02:37, 1 February 2016
  • region [is] a benchmark for" 4. True or False, The chemical element radium has been mapped by a gamma-ray spectrometer over the rocky surface of the
    14 KB (1,264 words) - 03:04, 1 February 2016
  • True or False, Indium is a transition-metal element. 11. Yes or No, Radium is an actinide element. 12. Carnotite is a potassium uranium 13
    15 KB (1,320 words) - 02:37, 1 February 2016
  • ecosystem. Minerals containing naturally radioactive elements (potassium, radium, uranium, thorium...) Background cosmic rays Solar flux Nuclear power plants
    3 KB (408 words) - 00:33, 27 April 2013
  • peaks for 226Ra, 214Pb, and 214Bi. These isotopes are part of the uranium-radium decay line. As 238U is an alpha-ray emitter, it is not shown. The peak at
    20 KB (2,089 words) - 16:43, 11 February 2016
  • development, testing at Alamogordo, and the deployment of the first (so-called) `atom' bombs (or A-bombs, that are in fact nuclear fission bombs). Thus, the famous
    17 KB (2,479 words) - 00:53, 2 July 2015
  • tellurium (Te). Alkaline earth metals - group 2: beryllium (Be) through radium (Ra). Alkali metals - group 1: lithium (Li) through francium (Fr). Body-centered
    107 KB (9,416 words) - 02:37, 1 February 2016
  • peaks for 226Ra, 214Pb, and 214Bi. These isotopes are part of the uranium-radium decay line. As 238U is an alpha-ray emitter, it is not shown. The peak at
    66 KB (6,164 words) - 02:32, 1 February 2016
  • True or False, Indium is a transition-metal element. 11. Yes or No, Radium is an actinide element. 12. Carnotite is a potassium uranium 13
    13 KB (1,191 words) - 02:36, 1 February 2016
  • potassium, uranium and thorium and their decay products, some of which, like radium and radon are intensely radioactive but occur in low concentrations." "An
    117 KB (11,991 words) - 19:34, 12 February 2016
  • Enjoy learning by doing! 1. Complete the text: 2. Yes or No, Radium is an actinide element. 3. Carnotite is a potassium uranium 4. Yes
    10 KB (893 words) - 02:38, 1 February 2016
  • potassium, uranium and thorium and their decay products, some of which, like radium and radon are intensely radioactive but occur in low concentrations." "An
    144 KB (16,074 words) - 00:15, 1 February 2016
  • peaks for 226Ra, 214Pb, and 214Bi. These isotopes are part of the uranium-radium decay line. As 238U is an alpha-ray emitter, it is not shown. The peak at
    120 KB (13,629 words) - 03:08, 1 February 2016
  • of its black color ... All uraninite minerals contain a small amount of radium as a radioactive decay product of uranium. Uraninite also always contains
    153 KB (17,147 words) - 20:03, 6 February 2016
  • 15. Complete the text: 16. True or False, The chemical element radium has been mapped by a gamma-ray spectrometer over the rocky surface of the
    42 KB (1,842 words) - 03:05, 1 February 2016
  • peaks for 226Ra, 214Pb, and 214Bi. These isotopes are part of the uranium-radium decay line. As 238U is an alpha-ray emitter, it is not shown. The peak at
    141 KB (14,120 words) - 04:21, 3 February 2016
  • radioactive sources such as 192Ir, 60Co or 137Cs are used." "While in the past radium and radon have both been used for radiography, they have fallen out of use
    133 KB (14,968 words) - 03:06, 1 February 2016
  • received in one hour at a distance of 1 cm from a point source of 1 mg of radium in a 0.5 mm thick platinum enclosure" is called a sievert. “The equivalent
    103 KB (10,022 words) - 03:10, 1 February 2016

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