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What is atomic nucleus? Who discovered i...

What is atomic nucleus? Who discovered it? What are atomic number and mass number? Explain with illustrations.

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What do you understand by atomic number and mass number? Explain giving examples.

What is the difference between atomic mass and mass number ?

Knowledge Check

  • The number of nucleons in an atom of atomic number Z and mass number A is

    A
    zero
    B
    Z
    C
    A-Z
    D
    A

  • The number of electrons in an atom of atomic number Z and mass number A is

    A
    Z
    B
    A
    C
    A-Z
    D
    None

  • The number of protons in an atom of atomic number Z and mass number A is

    A
    zero
    B
    Z
    C
    A-Z
    D
    A

    • Similar Questions

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    For stability in nucleus of atoms with lower atomic number:

    A uranium nucleus (atomic number 92 , mass number 231 ) emits an alpha -particle and the resultant nucleus emits a beta -particles. What are the atomic and mass numbers of the final nucleus? .

    Write the complete symbol for (i) the nucleus with atomic number 56 and mass number 138 (ii) the nucleus with atomic number 26 and mass number 55 (iii) the nucleus with atomic number 4 and mass number 9.

    The number of electrons in an atom of atomic number Z and mass number A is

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

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