Class IX

According to Rutherford, most of space occupied by atom is
  1. filled
  2. partially filled
  3. empty
  4. none of above
When Uranium-238 emits α particles it decays in to
  1. Helium
  2. Carbon
  3. Uranium-235
  4. Thorium-234
Lowest energy orbital among following is
  1. 2s
  2. 2p
  3. 3s
  4. 3p
D sub-shell can accommodate maximum
  1. 2 electrons
  2. 10 electrons
  3. 14 electrons
  4. 6 electrons
When an electron jumps from lower orbit to higher orbit
  1. light is emitted
  2. electrons are emitted
  3. electrons are absorbed
  4. light is absorbed
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