MCQOPTIONS
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MCQOPTIONS
| 1. |
Which of the following is the heavy isotope of nitrogen? |
| A. | <sup>14</sup>N |
| B. | <sup>15</sup>N |
| C. | <sup>13</sup>N |
| D. | <sup>16</sup>N |
| Answer» C. <sup>13</sup>N | |