Question

What is Phosphorus ? It is the element or compound define ?

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Answer 1

Answer:

Phosphorus is a chemical element with the symbol P and atomic number 15. ... Phosphorus is an element essential to sustaining life largely through phosphates, compounds containing the phosphate ion, PO43−. Phosphates are a component of DNA, RNA, ATP, and phospholipids, complex compounds fundamental to cells.

Oxidation states: −3, −2, −1, 0, +1, +2, +3, +4, +5 (a mildly acidic oxide)

Recognised as an element by: Antoine Lavoisier (1777)

Melting point: white: 317.3 K (44.15 °C, 111.5 °F); red: ∼860 K (∼590 °C, ∼1090 ...

Answer 2

Answer:

Phosphorus is a chemical element with the symbol P and atomic number 15. Elemental phosphorus exists in two major forms, white phosphorus and red phosphorus, but because it is highly reactive, phosphorus is never found as a free element on Earth.

Boiling point: white: 553.7 K (280.5 °C, 536.9 °F)

CAS Number: 7723-14-0 (red); 12185-10-3 (white)

Melting point: white: 317.3 K (44.15 °C, 111.5 °F); red: ∼860 K (∼590 °C, ∼1090 ...

In the Earth's crust: 5.2 (silicon = 100)