2. Questions Bank
  3. JEE Main & Advanced
  4. Chemistry
  5. Structure of Atom / परमाणु संरचना

JEE Main & Advanced Chemistry Structure of Atom / परमाणु संरचना Question Bank Atomic number, Mass number Atomic species

  • question_answer
    In the nucleus of  \[_{20}C{{a}^{40}}\] there are [CPMT 1990; EAMCET 1991]

    A)                 40 protons and 20 electrons

    B)                 20 protons and 40 electrons

    C)                 20 protons and 20 neutrons

    D)                 20 protons and 40 neutrons

    Correct Answer: C

    Solution :

               \[P=\,\]20, mass no. A = 40                    \[N=\,\]A?P = \[40-20=20\]                                 \[P=N=20.\]


You need to login to perform this action.
You will be redirected in 3 sec spinner