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 (s, p, d...

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.