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General outer electronic configuration of s-, p-,d-and f- block elements: (i) s- Block elements: ns 1-2 where n = 2 to 7 (ii) p-Block elements: ns 2 np 1-6 where n = 2 to 6 (iii) d-Block elements: (n - 1)d 1-10 ns 0-2 where n = 4 to 7 (iv) f-block elements: (n - 2)f 0-14 (n -1)d 0-1 ns 2 where n = 6 to 7.

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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?

329 Views

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.

General outer electronic configuration of s-, p-,d-and f- block elements:

(i) s- Block elements:
ns^1-2 where n = 2 to 7

(ii) p-Block elements: ns² np^1-6 where n = 2 to 6

(iii) d-Block elements:
(n - 1)d^1-10 ns^0-2 where n = 4 to 7

(iv) f-block elements:
(n - 2)f^0-14 (n -1)d^0-1 ns² where n = 6 to 7.

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80.

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

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