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| Abbreviation | Full Form | Category |
|---|---|---|
| H&R | Hit and Run |
Others
|
| H/R | Ham on Rye |
Others
|
| H/R | Heat Release |
Others
|
| HR | Croatia (Hrvatska) |
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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