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प्रश्न
What information do you get from the Fig. about the atomic number, mass number and valency of atoms X, Y and Z? Give your answer in a tabular form.
 |
 |
 |
| (X) | (Y) | (Z) |
टिप्पणी लिखिए
उत्तर
| Element | Atomic number | Mass number | Valency |
| X | 5 | 11 | 3 |
| Y | 8 | 18 | 2 |
| Z | 15 | 31 | 3, 5 |
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