The description of the 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, and f).
Category: The Matter
Metalloids and the difference between the positive ion and negative ion
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...
Properties and uses of some elements in the modern periodic table
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.
General properties of halogens in the modern periodic table
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, and Halogens are mono-valent elements as their...