Home
Class 11
CHEMISTRY
Assertion : The outer electronic config...

Assertion : The outer electronic configuration of Cr and Cu are `3d^(5) 4s^(1) ` and `3d^(10) 4s^(1)` respectively .
Reason : Electrons are filled in orbitals in order of increasing energies given by (n+l) rule.

A

if both assertion and reason are correct and reason is correct explanation for assertion .

B

If both assertion and reason are correct but reason in not correct explanation for assertion.

C

If assertion is correct but reason is incorrect.

D

If both assertion and reason are incorrect.

Text Solution

Verified by Experts

The correct Answer is:
B
Correct explanation. This is because completley filled and half-filled electronic configurations impart extra stability due to symmetrical distribution of electrons and more exchange energy.
Promotional Banner

Topper's Solved these Questions

  • STRUCTURE OF ATOM

    DINESH PUBLICATION|Exercise Reason Type Questions|1 Videos

  • STRUCTURE OF ATOM

    DINESH PUBLICATION|Exercise Comprehension Linked MCQs|42 Videos

  • STATES OF MATTER : GASES AND LIQUIDS

    DINESH PUBLICATION|Exercise Statement Type Question|5 Videos

  • SURFACE CHEMISTRY

    DINESH PUBLICATION|Exercise Ultimate Prepatarory Package|16 Videos

Similar Questions

Explore conceptually related problems

The outer electronic configuration of the ground state chromium atom is 3d^(2),4s^(2)

The outer electronic configuration of Ag is 4d^10 5s^1 , it belongs to

Electronic configuration of M^(3+) is [Ar]3d^(10)4s^(2) , it belongs to

The electronic configuration of copper is [Ar] 4s^(1) 3d^(10) and not [Ar] 4s^(2) 3d^(9) . Justify.

DINESH PUBLICATION-STRUCTURE OF ATOM-Assertion-Reason Type Questions
  1. Assertion : Photoelectric effect is most readily shown by ceasium met...

    Text Solution

    |

  2. Assertion (A) : An orbital cannot have more than two electrons, more o...

    Text Solution

    |

  3. Assertion : Both position and momentum of an electron can not be dete...

    Text Solution

    |

  4. Assertion : The energy of an electron is mainly determined by principa...

    Text Solution

    |

  5. Assertion (A) : Fe^(3+) (g) ion is more stable than Fe^(2+)(g) ion. ...

    Text Solution

    |

  6. Assertion : An orbital cannot have more than two electrons. Reason :...

    Text Solution

    |

  7. Assertion : The 19th electron in potassium atom enters 4s-orbital an...

    Text Solution

    |

  8. Assertion : Configuration of helium is 1s^(2) Reason : Hund's rule...

    Text Solution

    |

  9. Assertion : Cu^(2+) ion is a coloured ion . Reason : Every ion with...

    Text Solution

    |

  10. Assertion : The electronic configuration of K) (19) is 1s^(2)2s^(2)2p...

    Text Solution

    |

  11. Assertion : X-rays are used to study the interior of objects . Rea...

    Text Solution

    |

  12. Assertion : The outer electronic configuration of Cr and Cu are 3d^...

    Text Solution

    |

  13. Statement 1. An electron can never be found in the nucleus. Statemen...

    Text Solution

    |

  14. Statement 1. An atom is electrically neutral . Statement 2. Number ...

    Text Solution

    |

  15. Statement 1. In potassium atom, 19th electron enters 4s orbital and no...

    Text Solution

    |

  16. Statement 1. Fe^(2+)ion has 24 electrons and its electronic configura...

    Text Solution

    |