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  5. Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति

JEE Main & Advanced Chemistry Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति Sample Paper Topic Test - Periodic Table

  • question_answer
    In the modern periodic table, the block indicates the value of .......... for the last subshell that received electrons in building up the electronic configuration. Fill in the blank with appropriate option.

    A) Atomic number                          

    B) Azimuthal quantum number

    C) Principal quantum number                

    D) Atomic mass

    Correct Answer: B

    Solution :

    [b] The block indicates value of azimuthal quantum number \[(\ell )\] for the last sub-shell that received electrons in building up the electronic configuration. For example group 1 and group 2 elements belong to s-block as last electron enters in s-subshell.


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