Lecture 1: Why do we need to classify elements ; Genesis of periodic classification ; Modern periodic law and the present form of periodic table

  • Chapter 3 - Classification of Elements and Periodicity in Properties Assignments 1

    Define electronic configuration.

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  • Chapter 3 - Classification of Elements and Periodicity in Properties Assignments 2

    Give the general characteristics of the long form of Modern periodic table?

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  • Chapter 3 - Classification of Elements and Periodicity in Properties Assignments 3

    Describe the main features of Mendeleev’s periodic table?

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  • Chapter 3 - Classification of Elements and Periodicity in Properties Assignments 4

    Name the two elements whose existence and properties were predicted by
    Mendeleev though they did not exist then.

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  • Chapter 3 - Classification of Elements and Periodicity in Properties Assignments 5

    How did Mendeleev arrange the elements?

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  • Chapter 3 - Classification of Elements and Periodicity in Properties Assignments 6

    Define and state Mendeleev’s periodic law.

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  • Chapter 3 - Classification of Elements and Periodicity in Properties Assignments 7

    Stale the modern ‘Periodic law’?

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  • Chapter 3 - Classification of Elements and Periodicity in Properties Assignments 8

    What is the basis of triad formation of elements?

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  • Chapter 3 - Classification of Elements and Periodicity in Properties Assignments 9

    Who was the first scientist to classify elements according to their properties?

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  • Chapter 3 - Classification of Elements and Periodicity in Properties Assignments 10

    How many elements are known at present?

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  • Chapter 3 - Classification of Elements and Periodicity in Properties Assignments 11

    Which element do you think would have been named by

    (i) Lawrence Berkeley Laboratory

    (ii) Seaborg's group?

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  • Chapter 3 - Classification of Elements and Periodicity in Properties Assignments 12

    Write the atomic number of the element present in the third period and seventeenth group of the periodic table.

     

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  • Chapter 3 - Classification of Elements and Periodicity in Properties Assignments 13

    On the basis of quantum numbers, justify that the sixth period of the periodic table should have 32 elements.

     

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  • Chapter 3 - Classification of Elements and Periodicity in Properties Assignments 14

    What is the basic difference in approach between the Mendeleev's Periodic Law and the Modern Periodic Law?

     

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  • Description:-

    Lecture 1:
    Today, we will discuss the first three topics of this chapter, i.e; Why do we need to classify elements ; Genesis of periodic classification ; Modern periodic law and the present form of periodic table Chapter 3 - Classification of Elements and Periodicity in Properties
    OBJECTIVES:
    1:  Learn about periodic table  Why do we need to classify elements ; Genesis of periodic classification ; Modern periodic law and the present form of periodic table
    2: solve numericals based on these topics i.e; Why do we need to classify elements ; Genesis of periodic classification ; Modern periodic law and the present form of periodic table
    Important Tip:
     This lecture about Classification of Elements and Periodicity in Properties is base for the further chapters. These topics help in many ways as to understand the and how we can use them. It help you in further studies also.
    Please go through the topic, their notes. Properly do the assignments, watch videos of the concerned topics. If you any doubt about any topic/point please submit it in the discussion section... it will be answered as soon as possible.
    After all of this... when you fell confident about the particular topic/chapter then take the quiz.

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