Presentation is loading. Please wait.

Presentation is loading. Please wait.

Phosphorus Petra Kučerová Michaela Salajková. Physical properties Non-metallic Density: 1,83 g/cm 3 Melting point: 41 °C Boiling point: 277 °C Standart.

Similar presentations


Presentation on theme: "Phosphorus Petra Kučerová Michaela Salajková. Physical properties Non-metallic Density: 1,83 g/cm 3 Melting point: 41 °C Boiling point: 277 °C Standart."— Presentation transcript:

1 Phosphorus Petra Kučerová Michaela Salajková

2 Physical properties Non-metallic Density: 1,83 g/cm 3 Melting point: 41 °C Boiling point: 277 °C Standart state: solid Colour: white, red and black

3 Chemical properties The 15th group of periodic table 3 alotropic modifications Insoluble in water Soluble in carbon disulphide (= rozpustný v sirouhlíku) Biogenic element

4 White phosphorus Waxy (= měkký jako vosk) Toxic Pyrophoric (= samozápalný) Phosphorescing vapors (= fosforeskující páry) Very reactive By heating to 250 °C changes into the red modification

5 Red phosphorus Non-toxic Less reactive than the white one Amorphous substance (= amorfní látka) Stable on air

6 Black phosphorus Crystal structure Metallic lustre (= kovový lesk) Heat conductor (= vodič tepla) Conductor of electric current (= vodič el. proudu) The least reactive of all modifications Non-toxic

7 History Discovered in 1669 by Hennig Brand Isolated from urine ( = získán z moči ) Name – from Greek - Phosphoros = „bringer of light“

8 Occurence (= výskyt) Only compounds (apatite, phosphorite) Heavy occurence in the earth´s crust (= zemská kůra)

9 DNA, RNA

10 Lipids, bones

11 Uses 1 Safety matches Pyrotechnics Coca-cola Bone-ash - monocalcium phosphate – baking powder (= kostní moučka; prášek do pečiva)

12 Uses 2 Fertilizers (= hnojiva) Pesticides Alloys (= slitiny) Clean agents Water softeners

13 Hazards and risks 0,1 g of white phosphorus is deadly toxic Chronic poisoning of white phosphorus leads to necrosis of the jaw („phossy jaw“)

14 Thanks for your attention


Download ppt "Phosphorus Petra Kučerová Michaela Salajková. Physical properties Non-metallic Density: 1,83 g/cm 3 Melting point: 41 °C Boiling point: 277 °C Standart."

Similar presentations


Ads by Google