Classification of Elements and Periodicity in Properties

Short Answer Type

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Why atomic number is a better basis for classifying the elements than atomic mass?

The atomic mass of the element relates to the nucleus which is present in the centre of the atom. But the properties of the elements depend upon the electronic configuration which is linked with atomic number. Therefore, atomic number is a better basis for the classification of the elements than the atomic mass.
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    Long Answer Type

    What is long form of the periodic table? Discuss in brief its salient structural features.

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    Why is long form periodic table regarded better than the Mendeleev's periodic table?

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    Short Answer Type

    What are the defects of long form of the periodic table?

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    Long Answer Type

    Discuss the nomenclature of the element with atomic number greater than 100.
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    Short Answer Type

    What would be the IUPAC name and symbol for the element with atomic number 120?

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    Long Answer Type

    How many blocks are present in the long form of periodic table? How will you classify the elements of the periodic table into s, p, d and f blocks? 
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    Short Answer Type

    What are the advantages of classifying the elements into s, p, d and f-block elements?

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    Write the general outer electronic configuration of s-, p-, d- and f- block elements.
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    Which element do you think would have been named by:
    (i)  Lawrence Berkeley Laboratory
    (ii) Seaborg's group?

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