Home
Class 11
CHEMISTRY
Two elements X and Y are isotonic having...

Two elements X and Y are isotonic having atomic weight 54 and 56 respectively. If the atomic number of X is 26, then the atomic number of Y will be

A

26

B

27

C

28

D

30

Text Solution

Verified by Experts

The correct Answer is:
C
Number of neutrons in X=54-26 = 28
Number of neutrons in Y =28
`therefore` Atomic number of `Y= 56-28=28`
Promotional Banner

Topper's Solved these Questions

  • NUCLEAR AND RADIO CHEMISTRY

    DINESH PUBLICATION|Exercise Revision Questions from Competitive Exams|138 Videos

  • NUCLEAR AND RADIO CHEMISTRY

    DINESH PUBLICATION|Exercise Selected Straight Objected Type MCQs|26 Videos

  • NOMENCLATURE OF ORGANIC COMPOUNDS

    DINESH PUBLICATION|Exercise MCQs|13 Videos

  • ORGANIC CHEMISTRY - SOME BASIC PRINCIPLES & TECHNIOUES

    DINESH PUBLICATION|Exercise PURIFICATION & CHARACTERISATION OF ORGANIC COMPOUNDS|38 Videos

Similar Questions

Explore conceptually related problems

Two elements X and Y have atomic numbers 10 and 14 respectively. Identify the group numbers of these elements in the periodic table.

If W is atomic weight and N is the atomic number of an element, then

Atomic number of an element is 26. the element shows

Three elements X , Y and Z have atomic numbers 19 , 37 and 55 respectively . Then the correct statements (s) is / are

Three elements X,Y,Z are following Dobereiner's Triad rule. If the atomic weight of X and Y are 10 and 26 respectively, then atomic weight of Z will be:

The mass number of two atoms X and Y having same atomic number are 208 and 210 respectively. The number of neutrons in the nucleus of X is 126. The number of neutrons in the nucleus of Y is :

DINESH PUBLICATION-NUCLEAR AND RADIO CHEMISTRY-Evaluate Yourself
  1. Two elements X and Y are isotonic having atomic weight 54 and 56 respe...

    Text Solution

    |

  2. One among the following set of quantum numbers defines the highest ene...

    Text Solution

    |

  3. If threshold wavelength (lambda(0)) for ejection of electron from meta...

    Text Solution

    |

  4. All elements in the third period have

    Text Solution

    |

  5. One among the following species is planar

    Text Solution

    |

  6. From amongst the following triatomic molecules the least bond angle is...

    Text Solution

    |

  7. The atoms/ion listed in correct order of increasing size are

    Text Solution

    |

  8. The solution of Schrodinger equation for hydrogen leads to three quant...

    Text Solution

    |

  9. In which of the following are all the electrons paired ?

    Text Solution

    |

  10. The diamagnetic molecules from among mole cules of second period eleme...

    Text Solution

    |

  11. Which of the following statements is correct ?

    Text Solution

    |

  12. Amongst phosphorus halides the correct increasing order of bond angle ...

    Text Solution

    |

  13. The State of hybridisation of phosphorus (Z=15) in phosphate ion (PO(4...

    Text Solution

    |

  14. The strength of sigma bond formed by s-s, s-p & p-p overlaps are in th...

    Text Solution

    |

  15. In a crystalline solid, W atoms are at corners, O atoms at edge centre...

    Text Solution

    |

  16. A binary solid, A^(+) B^(-) ( formula mass= 60) has a CsCl structure....

    Text Solution

    |

  17. The molecular orbital shown below is described as

    Text Solution

    |

  18. Which among the following molecules has the largest dipole moment ?

    Text Solution

    |

  19. The difference between DeltaH and Delta E at constant voluem is equal ...

    Text Solution

    |

  20. If the critical frequency (v(0)) for emission of photoelectrons from a...

    Text Solution

    |

  21. The expected wavelength at which the first line of P fund series shall...

    Text Solution

    |