Zinc deficiency symptoms :
Third most developed transitionby man (after and ), zinc is best known for its good resistance to , industrial with
- Symbol: Zn
- Atomic number: 30
- Electrons by : 2, 8, 18, 2
- Atomic mass: 65.409 u
- The most stable isotopes: 64 Zn, with a greater than 4.3 billion billion years (48.2%), 66 stable Zn with 36 (28%), 68 stable Zn with 38 neutrons (19 %), 67 stable Zn with 37 neutrons (4.1%), 70 Zn with a half-life greater than 13 million billion years (0.6%)
- Series: Nonmetals
- Group, period, block: 12, 4, d
- Density: 7.13
- Point of : 419.527 ° C
- Boiling point: 907 ° C
History of zinc
Zinc has been known since antiquity, although it was not used in pure form. Theof this metal is to Anton von Swab ‘s credit in 1742, as well as Andreas Marggraf, who succeeded on his side four years later.
Properties of zinc
Pure zinc is in the form of a blue-gray metal. It is able to combine withand other nonmetals. The action of dilute on zinc gives off hydrogen. Its state is +2. With different environmental elements, the zinc surface reacts and forms a that dulls its shine but is adherent and protective.
Use of zinc
One of the mainof zinc is deposited on steels to protect them from corrosion: it is galvanization, whose products are used in the , household appliances or industrial equipment. The is prepared with copper and zinc. Some also contain zinc.
Some coins are minted in zinc: this was the case during the Second World War. The roofs are sometimes covered with zinc. This metal also has healing and.
Effects of zinc on health
Zinc is a necessary part of human health. Thecauses loss of appetite, decreased taste sensation and smell and slower of wounds. Excess zinc can cause cramps , vomiting or . At very high doses, the can be damaged. Similarly, the of is altered.