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Question
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.
Very Short Answer
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Solution
| Atomic mass | Group | Period |
| 44 | III | 4 |
| 72 | IV | 5 |
| 100 | VII | 6 |
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