Class IX

Two F-atoms share one electron in their outermost shell to gain electronic configuration of
  1. Xe
  2. Ar
  3. Kr
  4. Ne
Oxygen belongs to group VIA so number of electrons in its valence shell are
  1. 6
  2. 7
  3. 8
  4. 4
Atoms of metals form
  1. anions
  2. molecules
  3. cation
  4. none of above
Nobel gases are stable because they contain
  1. 7 electrons in valence shell
  2. 8 electrons in valence shell
  3. 5 electrons in valence shell
  4. 4 electrons in valence shell
Strength of intermolecular forces from ionic or covalent bond is
  1. weaker
  2. stronger
  3. equal
  4. none of above
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