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  1. An atom has electronic configuration 1s²2s²2p⁶3s²3p⁶3d³4s², you will place it in
  2. Role of hydrogen peroxide in the above reactions is respectively
  3. The maximum number of electrons in a subshell is given by the expression
  4. The polymer used in orthopaedic devices and in controlled drug release is
  5. The half-life of a reaction is inversely proportional to the square of the