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प्रश्न
Match the atomic number with the following:
A rare gas.
पर्याय
19
15
8
4
2
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उत्तर
2
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संबंधित प्रश्न
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(i) very stable?
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Write scientific reason.
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A part of modern periodic table is given below. On its basis, answer the following questions:
| Group No. → | 1 | 2 | 13 | 14 | 15 | 16 | 17 | 18 |
| Period ↓ | ||||||||
| 2 | A | B | ||||||
| 3 | E | D | F | C |
Write the molecular formula of the compound formed by the combination:
A and F
