MCQOPTIONS
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| 1. |
Boron has two stable isotopes, \[^{10}B\](19%) and \[^{11}B\](81%). The atomic mass that should appear for boron in the periodic table is [CBSE PMT 1990] |
| A. | 10.8 |
| B. | 10.2 |
| C. | 11.2 |
| D. | 10.0 |
| Answer» B. 10.2 | |