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Statement-I : Mass numbers of most of th...

Statement-I : Mass numbers of most of the elements are fractional.
Because
Statemen-II Mass numbers are obtained by comparing with the mass number of carbon taken as 12.

A

If both (A) and (R ) are correct and (R ) is the correct explanation for (A).

B

If both (A) and (R ) are correct but (R ) is not the correct explanation for (A )

C

If both (A) and (R ) are incorrect.

D

If both (A) and (R ) are incorrect.

Text Solution

Verified by Experts

The correct Answer is:
D
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Knowledge Check

  • The mass number of a nucleus of an element is

    A
    Always less than its atomic number
    B
    Always more than its atomic number
    C
    Sometimes equal to its atomic number
    D
    Sometimes more than and sometimes equal to its atomic number.

  • The atoms of the elements having same atomic number but different mass number are called -

    A
    Isobar
    B
    Iso electronic
    C
    Isotopes
    D
    Isotones

  • The atoms of the elements having same mass number but different atomic number are called-

    A
    Isotopes
    B
    Isobars
    C
    Isotones
    D
    Isomers

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    Are mass number and atomic number of an element same in all respects ?

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    compare the radii of the nuclei of mass numbers 27 and 64 .

    If the mass number of an atom of an element decreases by 4 and atomic number decreases by two then it is

    What is the valency of the element with atomic number 36 and mass number 84 ?

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