Home
Class 12
CHEMISTRY
An element X has the following isotopic ...

An element X has the following isotopic composition:
`.^(200)X:90% .^(199)X:8.0% .^(202)X:2.0%`
The weight average atomic mass of the naturally occurring element X is closest to

A

204 amu

B

198 amu

C

197 amu

D

200 amu

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • NTA NEET SET 48

    NTA MOCK TESTS|Exercise CHEMISTRY|45 Videos

  • NTA NEET SET 50

    NTA MOCK TESTS|Exercise CHEMISTRY|45 Videos

Similar Questions

Explore conceptually related problems

An element X has the following isotopic composition : .^(200)X:90%," ".^(199)X:8.0%," ".^(202)X:2.0% The weighted average atomic mass of the naturally occurring element X is closest to :

An element X has the following istopic compositon: .^(200)X(90%), .^(199)X(8.0%), .^(202)X(2.0%) The weighted average atomic mass of the naturally occuring element X is closent to

An element X has the following isotopic composition .^(200)X : 90%, .^(199)X: 8.0%, .^(202)X:2% . The Weighed average atomic mass of naturally occurring element X is closet to

An element, X has the following isotopic composition ""^(56)X : 90% ""^(57)X : 8% ""^(57)X: 2.0% . The weighted average atomic mass of the naturallyoccurring element X is closest to

0.25 gram atom of an element weighs 45.2 g. The atomic mass of the element X is

A sample of an element X contains two isotopes ._(8)^(16)X and ._(8)^(18)X . If the average atomic mass of this sample of the element be 16.2 u, calculate the percentage of the two isotopes in this sample.

(a) What are radioactive isotopes ? Give two examples of radioactive isotopes (b) Give any two uses of ratioactive isotopes (c) An element Z contains two naturally occuring isotopes ._(17)^(35) Z and ._(17)^(37)Z . If the average atomic mass of this element be 35.5 u, calculate the percentage of two isotopes.

Knowledge Check

  • An element X has the following isotopic composition : .^(200)X:90%," ".^(199)X:8.0%," ".^(202)X:2.0% The weighted average atomic mass of the naturally occurring element X is closest to :

    A
    199 amu
    B
    200 amu
    C
    201 amu
    D
    202 amu

  • An element X has the following istopic compositon: .^(200)X(90%), .^(199)X(8.0%), .^(202)X(2.0%) The weighted average atomic mass of the naturally occuring element X is closent to

    A
    `202 am u`
    B
    `200 am u`
    C
    `199 am u`
    D
    `201 am u`

  • An element X has the following isotopic composition .^(200)X : 90%, .^(199)X: 8.0%, .^(202)X:2% . The Weighed average atomic mass of naturally occurring element X is closet to

    A
    199 a.m.u.
    B
    200 a.m.u.
    C
    201 a.m.u.
    D
    202 a.m.u.
    • NTA MOCK TESTS-NTA NEET SET 49-CHEMISTRY
    1. An element X has the following isotopic composition: .^(200)X:90% .^...

      Text Solution

      |

    2. The position of both , an electron and a helium atom is known within 1...

      Text Solution

      |

    3. In which of the following options the order arrangement does not agree...

      Text Solution

      |

    4. Which one of the following compounds shows the presence of intramolecu...

      Text Solution

      |

    5. For real gases, van der Waals' equation is written as (P+(an^(2))/(V...

      Text Solution

      |

    6. If C(s)+O(2)(g)rarrCO(2)(g),DeltaH=X and CO(g)+1//2O(2)(g)rarrCO(2)(g)...

      Text Solution

      |

    7. KMnO4 can be prepared fromK2MnO4 as per the reaction: The reactio...

      Text Solution

      |

    8. Setting of plaster of paris is

      Text Solution

      |

    9. Some statements about heavy water are given below : (i) Heavy water...

      Text Solution

      |

    10. Which of the following statements is false ?

      Text Solution

      |

    11. which statement is wrong ?

      Text Solution

      |

    12. Which among the given molecules can exhibit tautomerism?

      Text Solution

      |

    13. A dilute aqueous solution of Na(2)SO(4) is electrolyzed using platinum...

      Text Solution

      |

    14. Which one of the following statements is not true ?

      Text Solution

      |

    15. If NaCl is doped with 10^(-4)mol%of SrCl(2) the concentration of cati...

      Text Solution

      |

    16. Blood cells retain their normal shape in solution which are

      Text Solution

      |

    17. Consider the following relations for emf of a electrochemical cell (...

      Text Solution

      |

    18. For a zero order reaction '[R]0 is the initial concentration

      Text Solution

      |

    19. Which one of the following forms micelles in aqueous solution above ce...

      Text Solution

      |

    20. The most abundant metal in the earth crust is

      Text Solution

      |