The density of matter and life applications of density
The density Each substance has its own density, The density is a physical property of the matter as each element and compound has its own density, and it varies with the temperature and the...
Tagged: The elements
The importance of good and bad conductors of heat
All metals are good conductors of heat and they are different in conducting the heat, which means that some metals conduct the heat faster than the other, The heat makes us comfortable and helps...
The atomic structure of the matter
The atom The atom is the fundamental building unit of the matter, and it is the smallest individual unit of the matter which can share in the chemical reactions, Boyle, Thomas, Rutherford and Bohr...
How can you calculate the valency of each element?
The valency The valency is the number of electrons that an atom gains, loses or even shares during a chemical reaction, The valency is the number of electrons that an atom needs to gain or...
The lanthanides and actinides in the modern periodic table
Lanthanides and actinides Lanthanides and actinides are located below the modern periodic table, They consist of two rows, They are known as the f-block elements because they have valence electrons in the f-shell, Lanthanides...
The properties of the noble (inert) gases
The inert gases are the elements in which the outermost electron shells are completely filled with the electrons, so they don’t participate in any chemical combination in the ordinary conditions.
