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प्रश्न
Which of the following sequences contain atomic numbers of only representative elements?
(i) 3, 33, 53, 87
(ii) 2, 10, 22, 36
(iii) 7, 17, 25, 37, 48
(iv) 9, 35, 51, 88
उत्तर
(i) 3, 33, 53, 87
(iv) 9, 35, 51, 88
Explanation:
Elements of 5 and p-block elements are called representative elements. Elements of f-block (Z = 21 – 30; 39 – 48; 57 and 72 – 80; 89 and 104 – 112) are called transition elements while those of f-block (with Z = 58 – 71 and Z = 90 – 103) are called inner transition elements.
(i) 3 – Group 1, 33 – group 15, 53 – group 17 and 87 – group 1.
(iv) 9 – Group 17, 35 – Group 17, 51 – Group 15, 88 – Group 2.
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संबंधित प्रश्न
Write the general outer electronic configuration of p- block elements.
In the modern periodic table, elements are arranged in order of increasing atomic numbers which is related to the electronic configuration. Depending upon the type of orbitals receiving the last electron, the elements in the periodic table have been divided into four blocks, viz, s, p, d and f. The modern periodic table consists of 7 periods and 18 groups. Each period begins with the filling of a new energy shell. In accordance with the Arfbau principle, the seven periods have 2, 8, 8, 18, 18, 32 and 32 elements respectively. The seventh period is still incomplete. To avoid the periodic table being too long, the two series of f-block elements, called lanthanoids and actinoids are placed at the bottom of the main body of the periodic table.
The last element of the p-block in 6th period is represented by the outermost electronic configuration.
Write four characteristic properties of p-block elements.
p-Block elements form acidic, basic and amphoteric oxides. Explain each property by giving two examples and also write the reactions of these oxides with water.
Aluminium belongs to ______.
