| http://www.w3.org/ns/prov#value | - The experimental part includes such experiments as observation of the natural radioactivity (??, ??, ??, no source), analysis of the types of charged particles, observation of collisions of charged particles (changing the orbit; "secondary ionization - ??-electrons), observation of the radioactive decay of different sources (U238, Rn220, Am 241, Sr90), deflection of the ?? -particles in the magne
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