Home
Class 12
PHYSICS
What are atomic number and mass numbers ...

What are atomic number and mass numbers ?

Text Solution

Verified by Experts

Atomic number is the number of protons in the nucleus which is represented by Z. The total number of nucleons (protons + neutrons) inside a nucleus is called mass number which is represented by A.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • NUCLEI

    SUBHASH PUBLICATION|Exercise THREE MARKS QUESTIONS WITH ANSWERS|18 Videos

  • NUCLEI

    SUBHASH PUBLICATION|Exercise FIVE MARKS QUESTIONS WITH ANSWERS|10 Videos

  • NUCLEI

    SUBHASH PUBLICATION|Exercise NUMARICALS WITH SOLUTIONS|26 Videos

  • MOVING CHARGES AND MAGNETISM

    SUBHASH PUBLICATION|Exercise NUMERICALS WITH SOLUTIONS|23 Videos

  • PUE BOARD MODEL QUESTION PAPER 1

    SUBHASH PUBLICATION|Exercise QUESTION|41 Videos

Similar Questions

Explore conceptually related problems

What is the atomic number and mass number of proton and tritium.

What is atomic number?

Knowledge Check

  • A hypothetical radioactive nucleus decays according to the following series: A overset(alpha)to A_1 overset(beta-)to A_2 overset(alpha)to A_3 overset(gamma)toA_4 If the mass number and atomic number of A are respectively 180 and 72 then the atomic number and mass number of A_(4) will be respectively

    A
    69,171
    B
    70,172
    C
    68,172
    D
    69,172

  • If an isotope of hydrogen has two neutrons on its atom, the atomic number and mass number will respectively will be :

    A
    2 and 1
    B
    3 and 1
    C
    1 and 1
    D
    1 and 3.

    • Similar Questions

    Explore conceptually related problems

    Write the complete symbol for : (a) The nucleus with atomic number 56 and mass number 138 , (b) The nucleus with atomic number 26 and mass number 55 , (c) The nucleus with atomic number 4 and mass number 9.

    Give the number of Protons, Electrons and Neutrons present in the atom having atomic number 27 and mass number 56.

    Name the isotope of hydrogen which have atomic number one mass number two.

    Write the complete symbol for the nucleus with atomic number 26 and mass number 55.

    Write the complete symbol for the nucleus with atomic number 56 and mass number 138

    Write the relation for binding energy (BE) (in MeV) of a nucleus of mass ""_(Z)^(A) M , atomic number (Z) and mass number (A) in terms of the masses of its constituents - neutrons and protons.

    Home
    Profile