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प्रश्न
Which of the following have inert gases 2 electrons in the outermost shell.
पर्याय
He
Ne
Ar
Kr
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उत्तर
He
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संबंधित प्रश्न
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Complete the following table:
| Symbol | Atomic No | Electronic Configuration | |
| 1. | He | 2 | ______ |
| 2. | Ne | ______ | 2,8 |
| 3. | Ar | ______ | 2, 8,8 |
| 4. | Na | 11 | ______ |
