Question

* Example 6
The electronic configuration of some elements are given
below. Group those elements which you expect should have similar
chemical properties.
(a) 152 2s 2 2p 3s1 (b) 182 2s 2 2p6
(c) 182 252 2p 3s 3p5 (d) 152 252 2p6 382 3p 64s1
(e) 1s2 252 2pº 382 3p6 (1) 1s 2s 2 2p6 3s2 3p 3d 10 4s2 4p5​

Answer 1

Answer:

(a) The correct electronic configuration of element A is:

1s

2

2s

2

2p

6

3s

2

3p

6

4s

1

(b) Fourth period.

(c) The electronic configuration of element A is

1s

2

2s

2

2p

6

3s

2

3p

6

4s

1

The electronic configuration of element C is

1s

2

2s

2

2p

6

3s

1

From the electronic configuration of the elements A and C, the atomic size of A is greater than the atomic size of C. Hence, the distance between the outermost electron of element A and its nucleus is more than the distance between the outermost electron and nucleus of element C. As the atomic size increases, the effective nuclear attraction experienced by the outermost electron decreases. Therefore, among the atoms A and C, the attraction of the nucleus towards the outermost electron is greater in case of element C.

Answer 2

Answer:

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Explanation:

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