Class IX

Elements that lie in same column have
  1. similar properties
  2. different properties
  3. same physical properties
  4. different chemical properties
In periodic table elements with similar valence shell configuration are placed in
  1. different groups
  2. same group
  3. can be placed any where
  4. none of above
Ability of atom to attract electrons towards itself is called
  1. electron affinity
  2. electronegativity
  3. ionization energy
  4. shielding effect
Energy required to remove an electron from outermost shell is called
  1. potential energy
  2. kinetic energy
  3. mechanical energy
  4. ionization energy
Elements are arranged in order of
  1. decreasing atomic number
  2. decreasing atomic mass
  3. increasing atomic number
  4. increasing atomic mass
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