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,...
The metalloids The metalloids are semi-metallic elements that have the properties of both metals and nonmetals, It is difficult to know the metalloids from their outermost electrons due to the difference in the numbers...
The elements The uses of the elements in our life depend on their properties. The elements are very important in our life, And we use them in many applications.
The halogens The halogens are located on the right side of the modern periodic table before the inert gases, The halogens are elements of group 7 A (17) in p-block, The halogens are mono-valent...
The alkali metals are located on the left side of the modern periodic table in the group (1) or (1 A). They are the first group of s-block, The alkali metals are mono-valent elements...
Modern periodic table In the modern periodic table, each period starts with the strong metal (in group 1 (1 A), where the metallic property decreases by increasing the atomic number, till we reach the...
