JEE Main & Advanced Chemistry Structure of Atom Question Bank Quantum number, Electronic configuration and Shape of orbitals

  • question_answer The  number  of electrons in the atom which has 20 protons in the nucleus          [CPMT 1981, 93; CBSE PMT 1989]

    A)                 20          

    B)                 10

    C)                 30          

    D)                 40

    Correct Answer: A

    Solution :

                    Nucleus of 20 protons atom having 20 electrons.

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