Tagged: The periods

The modern periodic table 0

The description of the modern periodic table

Modern periodic table The modern periodic table consists of 7 horizontal periods and 16 vertical groups ( 18 vertical columns ) . The elements of the modern periodic table are classified into 4 blocks...

Modern periodic Table 0

The attempts of the elements classification

The elements The scientists classified the elements according to their properties to facilitate their study and to find a relationship between the elements ,  and their chemical and physical properties .