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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

Equal to its atomic number

D

Sometimes more than and sometimes equal to its atoic number.

Text Solution

Verified by Experts

Mass number `ge` atomic number.
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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.

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 the nuclear matter density is nearly constant (i.e., independent of A).

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.

  • If A is mass number of a nucleus of Radius R, then

    A
    `A prop R^2`
    B
    `A prop R^(1/3)`
    C
    `A prop R`
    D
    `A prop R^3`

  • 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 ).

    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

    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.

    Assertion Positive value of packing fraction implies a large value of binding energy. Reason The ratio of the difference between the atomic mass of nucleus and the mass number of the nucleus to that of atomic mass is called packing fraction.

    The radius of a nucleus is given by r_(0) A^(1//3) where r_(0) = 1.3xx 10^(-15) m and A is the mass number of the nucleus, the Lead nucleus has A = 206. the electrostatic force between two protons in this nucleus is approximately

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