The matter construction and the properties of the molecules of the matter
The matter consists of very small structural units known as the molecules , The molecule is the smallest part of the matter which can exist freely , and it has the properties of the matter .
The properties of the molecules of the matter
The molecules of the matter are in a continuous motion and there are intermolecular spaces and attraction forces among the molecules of the matter , The kinds of the molecules are the element , the compound and the mixture .
The intermolecular spaces are the spaces that are found among the molecules of the matter , The intermolecular force is the force that bounds the molecules of the matter together .
The difference in the molecules of the various substances is found as the result of the difference of the atoms which are involved in the structure of the molecule , and depends on the number and the kind of the atoms , and the way of the combination together .
The element molecule
The element is the simplest pure form of the matter which can not analyzed chemically into the simpler form , The element molecule is formed of the similar atoms ( one or more atoms ) that combine together .
There are elements molecules that formed of only one atom ( The Monoatomic ) such as , the solids as ( Copper , Iron , Aluminum , Sulphur , Magnesium and Carbon ) and the liquids as mercury .
The noble gases such as ( Helium , Neon , Argon , Krypton , Xenon and Radon ) .
There are elements molecules that formed of two atoms ( Diatomic ) such as
The liquids as bromine .
The active gases such as ( Oxygen , Hydrogen , Chlorine , Nitrogen and Fluorine .
|Oxygen molecule is an active gas , and the molecules of the active gases are diatomic .|
The compound molecule
|The compound molecule is formed from different atoms .|
The compound molecule is formed of the different atoms and It is a substance which is formed from combination of the atoms of two or more different elements with the constant weight ratios .
Examples of the compound molecules :
Sodium chloride molecule ( table salt ) , Water molecule , Ammonia molecule , Hydrogen chloride .