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Lecture 3: Metal non-metals and metalloids ; Ionic radius ; Ionisation enthalpy

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

    Why does the ionization enthalpy gradually decreases in a group?

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

    What is the general outer electronic configuration of f – block elements?

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

    Why does lithium form covalent bond unlike other alkali which forms ionic
    bond?

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

    How does the reactivity of non–metals changes in a period and group?

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

    How do metals react in a period?

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

    Define ionization enthalpy and electron gain enthalpy?

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

      

    Which one of the following statements is incorrect in relation to ionization enthalpy?

    (a) Ionization enthalpy increases for each successive electron.

    (b) The greatest increase in ionization enthalpy is experienced on removal of electron from core noble gas configuration.

    (c) End of valence electrons is marked by a big jump in ionization enthalpy.

    (d) Removal of electron from orbitals bearing lower n value is easier than from orbital having higher n value.

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

    What is the basic difference between the terms electron gain enthalpy and electronegativity?

     

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

     

    Would you expect the second electron gain enthalpy of O as positive, more negative or less negative than the first? Justify your answer.

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

     

    What are the various factors due to which the ionization enthalpy of the main

    group elements tends to decrease down a group?

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

     

    How would you explain the fact that the first ionization enthalpy of sodium is

    lower than that of magnesium but its second ionization enthalpy is higher than

    that of magnesium?

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

    What does atomic radius and ionic radius really mean to you?

     

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    • Description:-

    Lecture 3:
    Today, we will discuss the next three topics of this chapter, i.e; Metal non-metals and metalloids ; Ionic radius ; Ionisation enthalpy Chapter 3 - Classification of Elements and Periodicity in Properties
    OBJECTIVES:
    1:  Learn about periodic table  Metal non-metals and metalloids ; Ionic radius ; Ionisation enthalpy
    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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