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प्रश्न
Right or wrong sentence.
The valency of the elements in group 2 is 1.
पर्याय
Right
Wrong
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उत्तर
The given sentence is wrong.
Explanation:
The valency of elements in Group 2 (the Alkaline Earth Metals) is 2, not 1.
- Reasoning: Elements in Group 2 have two electrons in their outermost shell (valence shell). To achieve a stable noble gas electron configuration, they readily lose these two electrons to form ions with a charge of + 2 (e.g., Mg2 +, Ca2+).
- Contrast: Elements in Group 1 (the alkali metals) have one electron in their outermost shell, which gives them a valency of 1.
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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An element has its electron configuration as 2, 8, 2. Now answer the following question.
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Write name of elements, symbol, atomic number, electronic configuration of second period in modern periodic table?
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- 2, 8, 2
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Observe the given chart and answer the questions given below.
| Element | A | B | C | D |
| Electronic configuration | 2, 1 | 2, 8 | 2, 8, 1 | 2, 8, 8 |
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- Write the name and valencies of the elements in 3rd row.
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- Write name of any two metalloid elements.
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- What is the atomic number of this element?
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