01: Atoms 02: Periodic Table / Elements 03: Chemical Bonds 04: Nomenclature 05: Structures of Matter 06: Substances of the environment 07: Chemical Reactions 08: Reactions in Equilibrium 09: Acid-base-reactions 10:Redox reactions 11: Carbon chemistry 12: Biochemistry 13: Qualitative analysis 14: Quantitative analysis 15: Chemical Industry 16: Reactions in the environment
Earth, our globe, is the living of all living creatures we know, including man, you for example.
Do not neglect your own house! Take care of a good maintenance; your existence depends on it.
We, men and women have the capacities and responsibilities to do so; we are no reasonless animals; we have got brains. Common sense too! And that sense should be based on knowledge, also knowledge about nature.
There is nothing in small stupid talk.
In this module you can collect some basic knowledge of the substances in our environment. We will treat only some substances in your environment and some of their properties, including substances that should not be there.
In another mudule we will talk about all kind of reactions that take place in our environment.
It is nice to include the old Greek division of substances on earth. They thought that all substances were composed of four elements: earth (solid), water (liquid), air (gas) and fire (spirit).
Enything solid, hard, contains lots of 'earth'.
Anything liquid must contain lots of water.
anything gaseous / thinny must contain air.
And yes, if you set fire to one or another substance, fire comes out! You can notice that. So fuel must contain lots of fire.
Funny yes, but modern science has complete different ideas.
|Sulfite-, Potassium-, Calcium- ans Bromide-ions||±1,8|
|Carbon dioxyde||0,04 (!)|
|other noble gases||0,003|