Posted by Ninan on Monday, May 19, 2014 at 3:10pm.
Look at the table of radioactive isotypes below.
Isotype Type of Decay
Uranium238 Alpha
Nickel63 Beta
Iodine131 Beta
Radium226 Alpha
With the help of a periodic table, predict the element that forms in each case.
I'm confused by this. Am I suppose to research each of the isotypes and find out what element they have or compare it to the elements that are in the periodic table?

Science  Damon, Monday, May 19, 2014 at 3:19pm
U238 for example has 92 protons and therefore 146 neutrons
It loses an alpha particle which is a helium nucleus, 2 protons and 2 neutrons
so
NOW we have an element with
92  2 = 90 protons
238  4 = 234 atomic mass ignoring E = mc^2
What has 90 protons?
Th Thorium 232 is usual isotope but we have Th234 at present

Science  Damon, Monday, May 19, 2014 at 3:27pm
Note from wikioedia:
Uranium238  Wikipedia, the free encyclopedia
en.wikipedia.org/wiki/Uranium238
Wikipedia
Jump to Radioactivity and decay  [edit]. 238U radiates alphaparticles and decays
**** (by way of thorium234 ****** and protactinium234) into uranium234. 234U ...
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