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प्रश्न
| Group in the modern periodic table | Families |
| 1 | ______ |
| ______ | Transition metals |
| ______ | Boron family |
| 15 | ______ |
| 17 | ______ |
रिक्त स्थान भरें
उत्तर
| Group in the modern periodic table | Families |
| 1 | alkali metals |
| 3 to 12 | Transition metals |
| 13 | Boron family |
| 15 | Nitrogen family |
| 17 | halogens |
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