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| Abbreviation | Full Form | Category |
|---|---|---|
| SEI | Italian Entomological Socety |
Others
|
| SEI | Safety Education Integrity |
Others
|
| SEI | Safety Equipment Institute |
Others
|
| SEI | Science and Engineering Indicators |
Others
|
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Nitrogen (Symbol: N, Atomic number: 7) is a non-metal element discovered in 1772. It belongs to period 2 and group 15 of the periodic table. It is the most abundant\u2026
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