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radium
uranium
actinium
thorium
Rate of diffusion of a gas is
Rectified spirit is:
Regarding the atom of a chemical element, magnetic quantum number refers to
Roxarsone, an arsenic containing nitrophenol is used as
Rusting of iron takes place due to
Rutherford’s scattering experiment proved the presence of
Rutherfords scattering experiment related to the size of the
Salts of which among the given elements provide colours to fireworks?
Saturated hydrocarbons have
Seaweeds are important source of