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प्रश्न
An element has its electron configuration as 2, 8, 1. Now answer the following questions:
- What is the atomic number of this element?
- What is the group of this element?
- To which period does this element belong?
उत्तर
- The atomic number of this element is 11.
- The group of this element is 1.
- This element belongs to the three periods.
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| Shell | n | 2n2 | Electron holding capacity |
| K | ______ | 2 × 12 | 2 |
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