Home
Class 10
CHEMISTRY
Assertion (A): Na' is a s-block element ...

Assertion (A): Na' is a s-block element Reason (R) : 'Na' gets its last coming electron (differentiating electron) into 3s orbital.

A

Both 'A' and 'R' are correct and 'R' supports 'A'

B

Both 'A' and 'R' are correct but 'R' does not supports 'A'

C

A' is correct but 'R' is wrong

D

A' is wrong but 'R' is correct

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • CLASSIFICATION OF ELEMENTS -THE PERIODIC TABLE

    VGS PUBLICATION-BRILLIANT|Exercise CREATIVE QUESTIONS FOR NEW MODEL EXAMINATION (SECTION -IV) (APPLICATION TO DAILY LIFE , CONCERN TO BIODIVERSITY )|4 Videos

  • CLASSIFICATION OF ELEMENTS-THE PPERIIODIC TABLE

    VGS PUBLICATION-BRILLIANT|Exercise EXERCISE|20 Videos

Similar Questions

Explore conceptually related problems

Assertion (A): Na -- forms an ionic bond. Reason (R): Number of valence electrons in sodium is '1'.

Assertion (A): Mg and Na forms cations.Reason (R) : Tendency of gaining electrons is called the electronegativity.

How many spin orientations are possible for an electron in S - orbital?

Which of the following element does not contain '3s' orbital ?

Write the four quantum numbers for the differentiating electron of sodium (Na) atom.

Assertion (A): AICI_3 exists as a dimer through halogen bridged bonds. Reason ( R) : AICI_3 gets stability by accepting electrons from the bridged halogen.

Assertion (A) : The orbital angular momentum of 2s-electron is equal to that of 3s-electron. Reason (R) : The orbital angular momentum is given by the relation sqrt(l(l+1))(h)/(2pi) and the value of 1 is same for 2s-electron and 3s-electron.

Assertion (A) : The energy of an electron in an atom is quantized. Reason( R ) : Electrons in an atom occupy stationary orbits.

Assertion (A): The first period in periodic table contain only two elements. Reason (R) : 'K' subshell could be occupied by two electrons only, 1s^1 and 1s^2 .

False statement about the de-Broglie.s wavelength of an electron in the Bohr.s orbit is

VGS PUBLICATION-BRILLIANT-CLASSIFICATION OF ELEMENTS-THE PERIODIC TABLES-EXERCISE
  1. Assertion (A) : It is a better way of arranging the elements in the pe...

    Text Solution

    |

  2. Z indicates in the notation ^A.Xz. i) Number of protons in the atom ii...

    Text Solution

    |

  3. Assertion (A): Na' is a s-block element Reason (R) : 'Na' gets its las...

    Text Solution

    |

  4. Assertion (A) : 'Cl' is a non-metal. Reason (R): Non-metal has five or...

    Text Solution

    |

  5. (a) Lanthanoids and actinoids are belongs to 3rd group. b) Lanthanoids...

    Text Solution

    |

  6. Assertion (A) : Lanthanides and Actinides are called as Inner  Transit...

    Text Solution

    |

  7. Why do elements in the same group have similar physical and chemical p...

    Text Solution

    |

  8. The pair of elements that have similar chemical properties are

    Text Solution

    |

  9. Pavan (P) : The general electronic configuration of alkali metal famil...

    Text Solution

    |

  10. Assertion (A): ‘H' & 'He' belongs to period - 1. Reason (R) : 'H & 'He...

    Text Solution

    |

  11. Assertion (A): The first period in periodic table contain only two ele...

    Text Solution

    |

  12. Suneetha (A) : Third period contain 18 elements, because it has 3 subs...

    Text Solution

    |

  13. James (A) : The positive ions of an element has less in size than its ...

    Text Solution

    |

  14. Balu (B) : Valence of an element with  respect to hydrogen is the numb...

    Text Solution

    |

  15. Valeney of Ca is

    Text Solution

    |

  16. Assertion (A) : Atomic radii increase from top to bottom in a group of...

    Text Solution

    |

  17. Assertion (A): Atomic radii of elements decrease across a period from ...

    Text Solution

    |

  18. Assertion (A) : The size of Na^+ ion is less than 'Na' atom. Reason (R...

    Text Solution

    |

  19. It is easier to remove one electron from O than N because Nitrogen has

    Text Solution

    |

  20. Which of the following property decreases down a group :

    Text Solution

    |