Class IX

Lowest energy orbital among following is
  1. 2s
  2. 2p
  3. 3s
  4. 3p
α particles are
  1. positively charged
  2. doubly positively charged
  3. negatively charged
  4. doubly negatively charged
Iodine-123 is used to
  1. diagnose thyroid problem
  2. image the brain
  3. kill cancer cells
  4. trace the blood flow
Protium has
  1. one neutron
  2. two neutrons
  3. no neutron
  4. 3 neutrons
Electronic configuration is arrangement of electrons in
  1. nucleus
  2. shells
  3. both A and B
  4. sub-shells
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