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प्रश्न
There are some vacant places in the Mendeleev’s periodic table. In some of these places the atomic masses are seen to be predicted. Enlist three of these predicted atomic masses along with their group and period.
अति संक्षिप्त उत्तर
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उत्तर
| Atomic mass | Group | Period |
| 44 | III | 4 |
| 72 | IV | 5 |
| 100 | VII | 6 |
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