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Define atomic number and mass number ....

Define atomic number and mass number .

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Explore conceptually related problems

(a) What is mean by (i) atomic number, and (ii) mass number, of an element ? Explain with the help of an example (b) What is the relation between the atomic number and mass number of an element ? (c) If an element M has mass number 24 and atomic number 12, how many neutrons does its atom contain ?

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.

Knowledge Check

  • A radioactiv element has atomic number A and mass number M. It emits one alpha - particle .The atomic number and mass number of new element will be

    A
    A-2,M-4
    B
    A-2,M
    C
    A,M-2
    D
    A-4,M-2

  • If a radioactive isotope with atomic number A and mass number M emits an alpha- particle, the atomic number and mass number of that new isotope will become

    A
    `A -2, M -4`
    B
    `A -2, M`
    C
    `A, M -2`
    D
    `A -4, M -2`

  • A radioactive element has atomic number A and mass number M. It emits one alpha -particle. The atomic number and mass number of new element will be

    A
    A-2, M-4
    B
    A-2, M
    C
    A, M-2
    D
    A-4, M-2

    • Similar Questions

    Explore conceptually related problems

    Distinguish between atomic number and mass number with an example.

    Distinguish between atomic number and mass number with an example.

    An element X consists of 20 protons and 20 neutrons. Mention the atomic number and mass number, and represent the element with atomic number and mass number.

    An atoms 'X' is made up of 20 protons and 20 neutrons. Write the atomic number and mass number and represent the atom with atomic number and number.

    An element of atomic number Z and mass number A, emits an alpha particle, a beta particle and gamma radiations. What is the atomic number and mass number of the daughter element ?

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