Home
Class 11
CHEMISTRY
Explain why is there a phenomenal decrea...

Explain why is there a phenomenal decrease in ionisation enthalpy from carbon to silicon?

Text Solution

Verified by Experts

The correct Answer is:
The force of attraction of nucleus on the valence electron is less in Si due to its larger size and shielding effect of inner electrons. Thus the valence electron can be more easily removed than in the case of C.
Promotional Banner

Topper's Solved these Questions

  • STRUCTURE OF ATOM

    A N EXCEL PUBLICATION|Exercise QUESTION BANK|92 Videos

  • THE S-BLOCK ELEMENTS

    A N EXCEL PUBLICATION|Exercise QUESTION BANK|71 Videos

Similar Questions

Explore conceptually related problems

The first ionisation enthalpy is the least in

The family of elements with the highest ionisation enthalpy:

Analyse the following graph between ionisation enthalpy and atomic number.

Gallium has higher ionisation enthalpy than aluminium. Explain why?

Ionisation is the removal of electron from an.atom. What is ionisation enthalpy? How is it related to electronic configuration of atoms.

Which has higher value for 1st ionisation enthalpy - oxygen or nitrogen. Why?

Does the ionisation enthalpy decreases along a group ? Give reasion

The energy released during the addition of an electron to an isolated neutral atom is called electron gain enthalpy. a) Explain how electron gain enthalpy differ from electronegativity. b) The second ionisation enthalpy of an element is always greater than the first ionisation enthalpy. Give reason.

A N EXCEL PUBLICATION-THE P-BLOCK ELEMENTS-QUESTION BANK
  1. Give reasons (vi) Aluminium utensils cannot be kept in water overnight

    Text Solution

    |

  2. Give reasons (vii) Aluminium wire is used to make transmission cables.

    Text Solution

    |

  3. Explain why is there a phenomenal decrease in ionisation enthalpy from...

    Text Solution

    |

  4. Classify the oxides as neutral, acidic amphoteric and basic CO, B2O3...

    Text Solution

    |

  5. A certain salt X gives the following reactions (i) Its aqueous solutio...

    Text Solution

    |

  6. A certain salt X gives the following reactions (ii) It swells up to a ...

    Text Solution

    |

  7. A certain salt X gives the reaction,When Con.H2SO4 is added to a hot s...

    Text Solution

    |

  8. Write balanced equation for BF3+LiH rarr

    Text Solution

    |

  9. Write balanced equation for B2H6+H2O rarr

    Text Solution

    |

  10. Write balanced equation for NaH+B2H6 rarr

    Text Solution

    |

  11. Write balanced equation for H3BO3 rarr

    Text Solution

    |

  12. Write balanced equation for Al+NaOH rarr

    Text Solution

    |

  13. Write balanced equation for B2H6+NH3 gives

    Text Solution

    |

  14. The aqueous solution of borax is

    Text Solution

    |

  15. Boric acid is polymeric due to -----

    Text Solution

    |

  16. Hybridisation of boron in B2H6 is -----

    Text Solution

    |

  17. Thermodynamically, the most stable allotrope of carbon is……………..

    Text Solution

    |

  18. The Elements of group 14 show ----- oxidation states

    Text Solution

    |

  19. Boron, Aluminium, Gallium, Indium and Thallium belong to group 13 of t...

    Text Solution

    |

  20. Boron, Aluminium, Gallium, Indium and Thallium belong to group 13 of t...

    Text Solution

    |