MCQOPTIONS
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| 1. |
On moving horizontally across a period, the number of electrons in the outermost shell increases from...... to........ |
| A. | 2, 8 |
| B. | 2, 18 |
| C. | 1, 8 |
| D. | 1, 18 |
| Answer» D. 1, 18 | |