The laser The laser is a device that emits light through a process of optical amplification based on the stimulated emission of the electromagnetic radiation, The laser is highly coherent, It is monochromatic in...
The muscular system The muscular system is the engine that moves our body, where the muscles generate the mechanical energy and the movement to the body due to the ability of the muscular cells...
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 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.
