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प्रश्न
An element has 2 electrons in its N shell.
What is its atomic number?
उत्तर
Electronic configuration of the element is:
| K | L | M | N |
| 2 | 8 | 8 | 2 |
Atomic number of element is (2 + 8 + 8 + 2) = 20
संबंधित प्रश्न
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| X | Y | |
| Protons | 6 | 6 |
| Neutrons | 6 | 8 |
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