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Answer- Isotopes of Hydrogen are- Protium   Deuterium  Tritium   The mass ratio is 1:2:3  
Answer- The electronic configuration of the H atom is . Due to the presence of only one electron, it exhibits dual behaviour,i.e., it resembles both alkali metals of group 1 and also along with the halogens of group 17. It can lose one electron to form a unipositive ion. Both H and alkali metals form monovalent cations by losing one electron from its outer shell. Both alkali and hydrogen shows...