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Phosphorus forms individual P4 molecules. This is the standard form for white phosphorus.
No. Phosphorus is solid at room temperature and is highly reactive.
Iodine is added to a solution of white phosphorus in carbon disulfide as solvent to form phosphorus triiodide.
P4 + 6I2 → 4PI3
1 cup of rice krispies contains 28mg of phosphorus.
Phosphorus does not travel through the atmosphere.