Many metals are chemically active elements and get easily affected by substances like moisture, air, acids, etc. One must have observed iron articles that are shiny when new, but get coated with a reddish brown powder when left for some time. This process is commonly known as rusting of iron. The problem with iron (as well as many other metals) is that oxidation takes place and the oxide formed does not firmly adhere to the surface of the metal causing it to flake off easily. This eventually causes structural weakness and disintegration of the metal.
When a metal is attacked by substances around it, it is said to corrode and this process is called corrosion. Corrosion causes deterioration of essential properties in a material.
What happens to copper vessels or artifacts when exposed to air and water? They slowly get tarnished by acquiring a thin green oxide layer. Similarly, silver quickly acquires a thin black oxide coating in moist air. The heaviest metal lead also tarnishes in moist weather. The black coating on silver and the green coating on copper are examples of corrosion in which the oxides formed strongly bond to the surface of the metal, preventing the surface from further exposure to oxygen and consequently slowing down corrosion.
Fuels burning is an oxidation reaction.
corrosion of metal substances
we can prevent harmful microbes in lots of different ways: by cleaning hands daily by staying fit and healthy by getting daily vaccinations
An enzyme lowers the activation energy of a reaction meaning that the reaction can occur at a much lower temperature. Enzymes are essential for supporting life, without enzymes the daily reactions that take place within all living organisms could not take place and life would cease to be able to exist.
People contribute daily to greenhouse effect. They do by littering and wasting etc.
Oxidation: rancidity , corrosion ,Oxidation reactions occur in the batteries, we use daily. Oxidation of Fruit and Vegetable Slices ,Decay of living matter by atmospheric oxidation, into CO2 and H2O reduction (i'm not so sure! but still): FUELING THE SPACE SHUTTLE. , COMBUSTION AND EXPLOSIONS , EXPLOSIVES , The primary process of reducing ore to produce metals is discussed in the article on Smelting.
By taking the oxygen for itself in order to prevent oxidation from taking place. For this reason, antioxidents need to be replenished daily.
Fuels burning is an oxidation reaction.
respiration
No it's not harmful in healthy males.
corrosion of metal substances
we can prevent harmful microbes in lots of different ways: by cleaning hands daily by staying fit and healthy by getting daily vaccinations
In reasonable doses - a daily amount of max. 5 g - NaCl is not harmful.
Salt can be harmful for the heart if the daily intake is greater than 2,5-5 g.
2 Mg + O2 gives 2MgO
it releases harmful radio active waves which s harmful to all living organism
yes