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| Abbreviation | Full Form | Category |
|---|---|---|
| P&F | Phineas and Ferb |
Others
|
| P&F | Plumber & Fitter 1st Class Petty Officer |
Others
|
| P.F. | Permanent Force |
Others
|
| PF | Package Freighter |
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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