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प्रश्न
Write the name of noble gas having 2 electrons in its valence shell.
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उत्तर
The noble gas having 2 electrons in its valence shell is helium.
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संबंधित प्रश्न
Write down the electronic configuration of the following elements from the given atomic numbers. Answer the following question with explanation.
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| Column A | Column B |
| Electronic configuration |
Valency |
| 1) 2, 2 | a) 1 |
| 2) 2, 8, 1 | b) 2 |
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| d) 5 |
Write the name.
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Write an Explanation.
Group
Write scientific reason.
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Complete the following chart.
| Shell | n | 2n2 | Electron holding capacity |
| K | ______ | 2 × 12 | 2 |
| L | 2 | ______ | 8 |
| ______ | 3 | 2 × 32 | 18 |
| N | 4 | 2 × 42 | ______ |
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- 2, 8, 2
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- 2, 1
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- Determine the position of the element X and Y periodic table.
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- From which block the elements X and Y are?
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What is the electronic configuration of K19?
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- What is the atomic number of this element?
- What is the group of this element?
- To which period does this element belong?
