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Classification of Elements and Periodicity in Properties

Long Answer Type

71.

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

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Short Answer Type

72.

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

325 Views

Long Answer Type

73.

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

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Short Answer Type

74.

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

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Long Answer Type

75. Discuss the nomenclature of the element with atomic number greater than 100.

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Short Answer Type

76.

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

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Long Answer Type

77. 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

78.

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

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79. Write the general outer electronic configuration of s-, p-, d- and f- block elements.

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80.
Which element do you think would have been named by:
(i) Lawrence Berkeley Laboratory
(ii) Seaborg's group?

i) Lawrencium (Lr) with Z = 103 is an actinide which involves the filling of 5f orbital andBerkelium (Bk) with Z = 97 is an actinide which involves the filling of 5f orbital (both of them are f block elements).

ii) Seaborgium (Sg) with Z = 106 is a d- block element present in 7th period & 6th column of periodic table.

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