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The mass number of a nucleus is....

The mass number of a nucleus is.

A

always less than its atomic number

B

always more than its atomic number

C

always equal to its atomic number

D

sometimes more than and sometimes equal to its atomic number

Text Solution

Verified by Experts

The correct Answer is:
d
The mass number of a nucleus is more than its atomic number, but in hydrogen, atomic number and mass number are equal.
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From the relation R=R_0 A^(1//3) where R_0 is a constant and A is the mass number of a nucleus, show that nuclear matter density is nearly constant.

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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.

  • When an alpha particle emitted from an unstable nucleus, the mass number of the nucleus

    A
    increases by 2
    B
    increases by 4
    C
    decreases by 4
    D
    decreases by 2

  • The radius of a spherical nucleus as measured by electron scattering is 3.6 fm. What is the mass number of the nucleus most likely to be ?

    A
    27
    B
    40
    C
    56
    D
    120

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    form the relation R=R_0A^(1//3) , where R_0 is a constant and A is the mass number of a nucleus, show that the nuclear matter density is nearly constant (i.e., independent of A ).

    In both beta^(-1) and beta^(+) decay processes, the mass number of a nucleus remains same, whereas the atomic number Z increases by one in beta^(-) decay and decreases by one in beta^(+) decay. Explain by giving reason.

    Consider the following statements (A) and (B) and identify the correct answer given below. Statement (A): Positive values of packing fraction implies a large value of binding energy. Statement (B): The difference between the mass of the nucleus and the mass number of the nucleus is called packing fraction

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