Class IX

. Atoms of metals form
  1. molecules
  2. anions
  3. cation
  4. none of above
Chemical bonding between atoms is
  1. electrical in nature
  2. mechanical in nature
  3. both A and B
  4. potential in nature
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
Non-metals have
  1. high ionization energies
  2. low ionization energies
  3. zero ionization energy
  4. infinite ionization energy
. In NaCl crystal each Na+ ion is surrounded by
  1. 6 Cl- ions
  2. 6 Na+ ions
  3. 8 Cl- ions
  4. 12 Cl- ions
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