elisakapaj27
elisakapaj27 elisakapaj27
  • 24-11-2022
  • Chemistry
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Element X, the oxide of which has the formulo X₂0% form with hydrogen a Find the relative atomic that contains 0.78% hydrogen. mass of element x In gas compound in the nucleas of the atom of element x there are 21 more neutrons than photons Find the atomic number Z of element X​

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