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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.
1H, 7N, 20Ca, 16S, 4Be, 18Ar Which of these elements belong to the second group?
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उत्तर
1H, 7N, 20Ca, 16S, 4Be, 18Ar
Electronic configuration of the following elements is:
1H = 1
7N = 2,5
20Ca = 2,8,8,2
16S = 2,8,6
4Be = 2,2
18Ar = 2,8,8
20Ca, 4Be belong to second group because these elements have 2 electrons in its outermost shell.
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संबंधित प्रश्न
An element has its electron configuration as 2, 8, 2. Now answer the following question.
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b. What is the group of this element?
c. To which period does this element belong?
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Which among the following elements would lose an electron easily?
Find the odd one out and give its explanation.
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| 1) 2, 2 | a) 1 |
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| 3) 2, 5 | c) 3 |
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Match the columns.
| Column A | Column B |
| 1) Alkaline earth metals | a) Group 18 |
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| 4) Noble gas | d) Group 1 |
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Write the name.
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Right or wrong sentence.
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| K | 2 × 12 | 2 | |
| L | 2 | 8 | |
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