Home
Class 11
CHEMISTRY
Why is the size F^(-) smaller tha that o...

Why is the size `F^(-)` smaller tha that of `O^(2-)` ion?

Text Solution

Verified by Experts

`O^(2-) and F^(-)` ions are isoelectronic, but their nuclei contain 8 and 9 protons respectively. So, nuclear attractive force acting on the electrons of `F^(-)` ion is greater than that on the electrons of `O^(2-)` ion. Consequently, `F^(-)` ion is smaller than `O^(2-)` ion.
Promotional Banner

Topper's Solved these Questions

  • CLASSIFICATION OF ELEMENTS & PERIODICITY IN PROPERTIES

    CHHAYA PUBLICATION|Exercise SOLVED WBCHSE SCANNER|35 Videos

  • CLASSIFICATION OF ELEMENTS & PERIODICITY IN PROPERTIES

    CHHAYA PUBLICATION|Exercise SOLVED NCERT EXERCISE|40 Videos

  • CLASSIFICATION OF ELEMENTS & PERIODICITY IN PROPERTIES

    CHHAYA PUBLICATION|Exercise PRACTICE SET|12 Videos

  • CHEMICAL BONDING AND MOLECULAR STRUCTURE

    CHHAYA PUBLICATION|Exercise PRACTICE SET|10 Videos

  • REDOX REACTIONS

    CHHAYA PUBLICATION|Exercise PRACTICE SET|4 Videos

Similar Questions

Explore conceptually related problems

Why is atomic size of Ca^(2+) smaller than that of K^(+) ?

Why are the cations smaller than atom?

Why is Fe^(2+) ion smaller than Mn^(2+) ion ?

Explain why the size of a cation is smaller than that of corresponding neutral atom and it is reverse for an anion.

Explain why Fe^(3+) is more stable than Fe^(2+) ion.

(b) What is the total charge of 1.6g O^(2-) ion ?

Predict the similarties between F_(2) molecule and O_(2)^(2-) ion on the basis of MO theory.

Why is the span of a year smaller for a planet closer to the sun ?

Explain why radii of positive ions are always smaller than the radii of corresponding neutral atoms and why negative ions have larger radii than the corresponding neutral atom.

Dipole moment of phenol is smaller than that of methanol. Why ?

CHHAYA PUBLICATION-CLASSIFICATION OF ELEMENTS & PERIODICITY IN PROPERTIES-QUESTION-ANSWER ZONE FOR BOARD EXAMINATION
  1. What do mean by the statement-covalent radius of H-atom is 0l.37 Å?

    Text Solution

    |

  2. indicate the similarity observed in the electron-gain enthalpy values ...

    Text Solution

    |

  3. Why is the size F^(-) smaller tha that of O^(2-) ion?

    Text Solution

    |

  4. Compare the radii of K^(+) and Cl^(-) ions (each contain the same numb...

    Text Solution

    |

  5. What do you underrstand by negative value of electro-gain enthalpy of ...

    Text Solution

    |

  6. Electronic configuration of the atom of an element is 1s^(2)2s^(2)2p^(...

    Text Solution

    |

  7. Atomic numbers of elements A,B and C are 10,13, & 17 respectively. (1)...

    Text Solution

    |

  8. A, B and C are three elements with atomic numbers 17,18 and 20 respect...

    Text Solution

    |

  9. Outer electronic configuration of 4 elements are as given below follow...

    Text Solution

    |

  10. Write electronic configuration of the element with atomic number 35. w...

    Text Solution

    |

  11. Justify the mentioning two reasons, the inclusion of Ca and Mg in the ...

    Text Solution

    |

  12. Cu, Ag & Au are regarded as transition elements. Why?

    Text Solution

    |

  13. Write down electronic configuration of the element having atomic numbe...

    Text Solution

    |

  14. Can Cu (At. No. 29) and Zn (At. No. 30) be called transition elements?...

    Text Solution

    |

  15. Atomic number of three elements A,B and C are 8, 13 and 17 respectivel...

    Text Solution

    |

  16. Why is atomic size of Ca^(2+) smaller than that of K^(+) ?

    Text Solution

    |

  17. Atomic radius of chlorine atom is 0.99 Å but ionic radius of chloride ...

    Text Solution

    |

  18. First ionisation energy of elements increases with atomic numbers of t...

    Text Solution

    |

  19. Ionisation potential of O is less than that of N-explain.

    Text Solution

    |

  20. Explain why the Ionisation potential of inert gases are very high whit...

    Text Solution

    |