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प्रश्न
Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.
4Be, 6C, 8O, 5B, 13Al Which is the most electropositive element among these?
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उत्तर
4Be, 6C, 8O, 5B, 13Al
Electronic configuration of the following elements is:
4Be = 2,2
6C = 2,4
8O = 2,6
5B = 2,3
13Al = 2,8,3
13Al is the most electropositive element among these because 4Be, 6C, 8O, 5B belong to same period, but 13Al belong to next period. According to the trend, electropositive character of an elements increases as we move from top to bottom in a group of the periodic table. This happens as the tendency of an atom to lose electrons increases due to decrease in nuclear charge and increase in numbers of shell.
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संबंधित प्रश्न
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An element has its electron configuration as 2, 8, 2. Now answer the following question.
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(Atomic numbers are given in the brackets)
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| Column A | Column B |
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| 2) p -block | b) Group 3 to 12 |
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| 4) f -block | d) Group 13 to 18 |
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| Column A | Column B |
| 1) Alkaline earth metals | a) Group 18 |
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| 3) Halogen | c) Group 2 |
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| e) Group 14 |
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