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प्रश्न
Match the columns.
| Column A | Column B |
| 1) Alkaline earth metals | a) Group 18 |
| 2) Alkali metals | b) Group 17 |
| 3) Halogen | c) Group 2 |
| 4) Noble gas | d) Group 1 |
| e) Group 14 |
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उत्तर
| Column A | Column B |
| 1) Alkaline earth metals | c) Group 2 |
| 2) Alkali metals | d) Group 1 |
| 3) Halogen | b) Group 17 |
| 4) Noble gas | a) Group 18 |
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संबंधित प्रश्न
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ii. What is the valency of this element?
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To which period does this element belong?
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Answer the following question in one sentence.
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Match the columns.
| Column A Electronic configuration |
Column B Valency |
| 1) 2, 2 | a) 1 |
| 2) 2, 8, 1 | b) 2 |
| 3) 2, 5 | c) 3 |
| d) 5 |
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Right or wrong sentence.
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Write an explanation.
Group
Write a scientific reason.
Boron and oxygen elements are placed in the second period in periodic table.
Write a scientific reason.
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- What is the atomic number of element A?
- Find the group to which this element belongs.
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XY compound is formed by X (Atomic number 11) and Y (Atomic number 17), then answer the questions given below.
- Determine the position of the element X and Y periodic table.
- Which type of elements X and Y are metals, nonmetals or metalloids?
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- Determine the electronic configuration and valency of these elements.
