The molecular weight of phosphorus is 30.973762.

Phosphorus is an element. It has an atomic number of 15, an atomic weight of 30.973762, and is located in period 3, group VA, of the periodic table. Relative atomic mass of about 31 formed by the monomers are mainly red phosphorus (red phosphorus) and white phosphorus (yellow phosphorus) easy to burn, on fire is not easy to extinguish.

Phosphorus has white phosphorus, red phosphorus, black phosphorus three isomers. White phosphorus, also called yellow phosphorus, is a white to yellow waxy solid with a melting point of 44.1°C, a boiling point of 280°C, and a density of 1.82 g/cm3. White phosphorus is very reactive and must be stored in water, and a person who breathes in 0.1 g of white phosphorus will die of poisoning.

Elemental content

Elemental content in the sun: 7 ppm.

Elemental content in seawater: 0.0015 ppm.

Elemental content in the earth's crust: 1,000 ppm.

Phosphorus is widely distributed in the biosphere, and the earth's crust is richly listed in the top 10. The concentration in seawater belongs to the 2nd category. Widely present in plant and animal tissues, but also the human body is one of the more content of the elements, slightly after calcium is ranked sixth. It accounts for about 1% of human body weight, and the adult body contains about 600-900g of phosphorus. 85.7% of the phosphorus in the body is concentrated. Body phosphorus 85.7% concentrated in the bone and teeth, the rest of the scattered distribution in the body tissues and body fluids, half of which exists in the muscle tissue.

Reference: Baidu Encyclopedia-Phosphorus