Home
Class 11
CHEMISTRY
The radius of calcium ion is 94 pm and o...

The radius of calcium ion is 94 pm and of oxide ion is 146pm. Predict the crystal structure of calcium oxide.

Text Solution

Verified by Experts

The ratio `(r_(+))/(r_(-)) = (94)/(146) = 0.644`
The prediction is an octahedral arrangement of the oxide ions around the calcium. Because the ions have equal but opposite charges, there must also be an octahedral arrangement of calcium ions around oxide ions. Thus CaO structure is similar to Rock Salt (NaCl) structure.
Promotional Banner

Topper's Solved these Questions

  • SOLID STATE

    RESONANCE|Exercise Exercise -1|24 Videos

  • SOLID STATE

    RESONANCE|Exercise Part-II : Only one option correct type|42 Videos

  • SOLID STATE

    RESONANCE|Exercise Part- IV|22 Videos

  • S BLOCK ELEMENTS

    RESONANCE|Exercise INORGANIC CHEMISTRY(s-Block Elements)|36 Videos

  • STRUCTURAL IDENTIFICATION & PRACTICAL ORGANIC CHEMISTRY

    RESONANCE|Exercise Section -B|18 Videos

Similar Questions

Explore conceptually related problems

The radius of a calcium ion is 94 pm and of an oxide ion is 146 pm. Predict the crystal structure of calcium oxide.

The commerical name for calcium oxide is :

The radius of the Na^(+) is 95 pm and that of CI ion is 181 pm Predict the coordination number of Na^(+) ?

The radius of Na(+) is 95 pm and that of CI^(-) ions is 181 pm. Predict whethr the coordination number of Na^(+) is 6 or4.

RESONANCE-SOLID STATE-Miscellaneous solved problems
  1. Calculate the number of fornula units in each of the following types o...

    Text Solution

    |

  2. A mineral having the formula AB(2) crytallises in the cubic close-pack...

    Text Solution

    |

  3. (a) What is the C.N. of Cr atom in bcc structure ? (b) Cobalt metal ...

    Text Solution

    |

  4. Titanium metal has a density of 4.54 "g cm"^(-3) and an edge length of...

    Text Solution

    |

  5. MgO has a structure of NaCl and TiCl has the structure of CsCl. What a...

    Text Solution

    |

  6. A solid AB has the NaCL structure, If radius of cation A^(+) is 120 pm...

    Text Solution

    |

  7. Co-ordination number (CN) of barium ion (Ba^(2+)) in BaF^(2) is 8. Wha...

    Text Solution

    |

  8. The radius of calcium ion is 94 pm and of oxide ion is 146pm. Predict ...

    Text Solution

    |

  9. Sodium metal crystallises in body centred cubic lattic with cell edge ...

    Text Solution

    |

  10. CsCl has bcc structure with Cs^(+) at the centre and Cl^(-) ion at eac...

    Text Solution

    |

  11. Platinum (atomic radius = 1.38 Å) crystallises in a cubic closed packe...

    Text Solution

    |

  12. Calculate the edge length of the unit cell of sodium chloride given de...

    Text Solution

    |

  13. The effective radius of an iron atom is 1.42 Å. It has a rock-salt str...

    Text Solution

    |

  14. In a CPS (close packed structure) of mixed oxides, it is found that la...

    Text Solution

    |

  15. An element crystallises as face-centred cubic lattice with density as ...

    Text Solution

    |

  16. Calcium crystallises in a face - centred cubic unit cell with a=556nm....

    Text Solution

    |