Home
Class 11
CHEMISTRY
Assertion: Lithium resembles magnesium i...

Assertion: Lithium resembles magnesium in its properties
Reason: The ratio of ionic charge to `"(Ionic radius)"^2` is almost same for `Li^+` and `Mg^(2+)`

A

Both Assertion and Reason are true and Reason is the correct explanation of Assertion

B

Both Assertion and Reason are true and Reason is not the correct explanation of Assertion

C

Assertion is true but Reason is false

D

Assertion is false but Reason is true

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • PERIODIC PROPERTIES

    AAKASH SERIES|Exercise LEVEL-II (TYPE-I) LECTURE SHEET-1 (MORE THAN ONE CORRECT ANSWER )|5 Videos

  • PERIODIC PROPERTIES

    AAKASH SERIES|Exercise LEVEL-II (TYPE-I) LECTURE SHEET-1 (LINKED COMPREHENSION)|5 Videos

  • PERIODIC PROPERTIES

    AAKASH SERIES|Exercise LEVEL-I (MAIN) EXERCISE-III|22 Videos

  • PERIODIC CLASSIFICATION

    AAKASH SERIES|Exercise OBJECTIVE EXERCISE - 3 (RECENT AIPMT/NEET QUESTIONS)|14 Videos

  • PERIODIC TABLE

    AAKASH SERIES|Exercise EXERCISE ON PASSAGE|12 Videos

Similar Questions

Explore conceptually related problems

Assertion (A) : The charge on one mole of electrons is one Faraday. Reason (R ) : The quantity of current required to deposit one mole of Mg form Mg^(2+) electrolyte solution is two Faradays. The correct answer is

A1^(3+) ion has a lower ionic radius than Mg^(2+) ion because

The ratio of the radius of second orbit of Li^(2+) to that of thired orbit of Be^(3+) is

Assertion (A) : Na^+ and Mg^2+ ions are isoelectronic but the ionic radius of Na^+ is greater than the of Mg^2+ . Reason (R) : The effective nuclear charge of Na^+ ion is less than that of Mg ^2+ ion.

It is not possible to measure the atomic radius precisely since the electron cloud surrounding the atom doesnot have sharp boundary. One practical approach to estimate the size of an atom of a non-metallic element is to measure the distance between two atoms when they are bound together by a single bond in a covalent molecule and then dividing by two. For metals we define the term "metallic radius" which is taken as half the internuclear distance separating the metal cores in the metallic crystal. The vander Waal's radius represents the overall size of the atoms which includes its valence shell in a nonbonded situation. It is the half of the distance between two similar atoms in separate molecules in a solid. The atomic radius decreases across a period and increases down the group. Same trends are observed in case of ionic radius. Ionic radius of the species having same number of electrons depends on the number of protons in their nuclei. The size of iso electronic species -F^(-) , Na^(+) and Mg^(2+) is effected by

It is not possible to measure the atomic radius precisely since the electron cloud surrounding the atom doesnot have sharp boundary. One practical approach to estimate the size of an atom of a non-metallic element is to measure the distance between two atoms when they are bound together by a single bond in a covalent molecule and then dividing by two. For metals we define the term "metallic radius" which is taken as half the internuclear distance separating the metal cores in the metallic crystal. The vander Waal's radius represents the overall size of the atoms which includes its valence shell in a nonbonded situation. It is the half of the distance between two similar atoms in separate molecules in a solid. The atomic radius decreases across a period and increases down the group. Same trends are observed in case of ionic radius. Ionic radius of the species having same number of electrons depends on the number of protons in their nuclei. Atomic radii of the noble gases are larger than the precedent elements of the same periods because

It is not possible to measure the atomic radius precisely since the electron cloud surrounding the atom doesnot have sharp boundary. One practical approach to estimate the size of an atom of a non-metallic element is to measure the distance between two atoms when they are bound together by a single bond in a covalent molecule and then dividing by two. For metals we define the term "metallic radius" which is taken as half the internuclear distance separating the metal cores in the metallic crystal. The vander Waal's radius represents the overall size of the atoms which includes its valence shell in a nonbonded situation. It is the half of the distance between two similar atoms in separate molecules in a solid. The atomic radius decreases across a period and increases down the group. Same trends are observed in case of ionic radius. Ionic radius of the species having same number of electrons depends on the number of protons in their nuclei. The correct order of radii is

It is not possible to measure the atomic radius precisely since the electron cloud surrounding the atom doesnot have sharp boundary. One practical approach to estimate the size of an atom of a non-metallic element is to measure the distance between two atoms when they are bound together by a single bond in a covalent molecule and then dividing by two. For metals we define the term "metallic radius" which is taken as half the internuclear distance separating the metal cores in the metallic crystal. The vander Waal's radius represents the overall size of the atoms which includes its valence shell in a nonbonded situation. It is the half of the distance between two similar atoms in separate molecules in a solid. The atomic radius decreases across a period and increases down the group. Same trends are observed in case of ionic radius. Ionic radius of the species having same number of electrons depends on the number of protons in their nuclei. Which of the following statement is correct?

It is not possible to measure the atomic radius precisely since the electron cloud surrounding the atom doesnot have sharp boundary. One practical approach to estimate the size of an atom of a non-metallic element is to measure the distance between two atoms when they are bound together by a single bond in a covalent molecule and then dividing by two. For metals we define the term "metallic radius" which is taken as half the internuclear distance separating the metal cores in the metallic crystal. The vander Waal's radius represents the overall size of the atoms which includes its valence shell in a nonbonded situation. It is the half of the distance between two similar atoms in separate molecules in a solid. The atomic radius decreases across a period and increases down the group. Same trends are observed in case of ionic radius. Ionic radius of the species having same number of electrons depends on the number of protons in their nuclei. Which one among the following sets of ions represents the collection of isoelectronic species?

If the ratio of energies of electron in the excited states of H and Li^(2+) is 1 : 9, the radius ratio of electron in the same excited states of H and Li^(2+) is

AAKASH SERIES-PERIODIC PROPERTIES-LEVEL-I (MAIN) EXERCISE-IV
  1. The more basic oxide is

    Text Solution

    |

  2. An element with 1s^2 2s^2 2p^6 3s^2 electronic arrangement will be for...

    Text Solution

    |

  3. Diagonal relationship is present between the lighter elements of perio...

    Text Solution

    |

  4. The diagonal relationship phenomenon is not observed after

    Text Solution

    |

  5. The polarising power of which of the following pair is similar

    Text Solution

    |

  6. Which of the following oxide is amphoteric?

    Text Solution

    |

  7. Assertion: Be and Al have similar properties. Reason : Cations of Be...

    Text Solution

    |

  8. Assertion: Li generally forms covalent compounds Reason : Li^+ ion ...

    Text Solution

    |

  9. Assertion:As2O3 and Sb2O3 are amphoteric in nature Reason : As and ...

    Text Solution

    |

  10. Assertion: Lithium resembles magnesium in its properties Reason: Th...

    Text Solution

    |

  11. Some statements are given. Among them the correct statements are (a...

    Text Solution

    |

  12. Elements X, Y and Z have atomic numbers 19, 37 and 55 respectively. Wh...

    Text Solution

    |

  13. The statement that is false for the long form of the periodic table is

    Text Solution

    |

  14. The compound of vanadium has magnetic moment of 1.73 BM. The vanadium ...

    Text Solution

    |

  15. The frequency of the characterstic X ray of K(alpha) line of metal tar...

    Text Solution

    |

  16. (IE)1 and (IE)2 of Mg((g)) are 740, 1540 kJ mol^(-1) . Calculate perce...

    Text Solution

    |

  17. Use (IE) and (EA) listed below to determine whether the following proc...

    Text Solution

    |

  18. If Aufbau rule is not followed, K - 19. will be placed in

    Text Solution

    |

  19. M((g)) to M((g))^(+) + e^(-) , DeltaH=100 eV , M((g)) to M((g))^(2+) +...

    Text Solution

    |

  20. AB is predominantly ionic as A^+ B^- if

    Text Solution

    |