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प्रश्न
What is the fundamental difference in the electron configurations between the group 1 and group 2 elements?
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उत्तर
| Group I | Electronic configuration | Group II | Electronic configuration |
| Li (Lithium) | 2, 1 | Be (Beryllium) | 2,2 |
| Na (Sodium) | 2, 8, 1 | Mg (Magnesium) | 2,8,2 |
| K (Potasium) | 2, 8, 8, 1 | Ca (Calcium) | 2,8,8,2 |
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