What are the types of covalent bonds?
The covalent bond The covalent bond is a bond occurred among the atoms of nonmetals through the participation of each atom with the same number of electrons to complete the outer electron shell.
Tagged: The elements
What is the ionic bond? & the characteristics of the ionic compounds
The element is composed of the molecules, Each molecule consists of the atoms, the atom is electrically neutral in its ordinary state (In the atom, the number of the electrons equals the number of...
The properties of the alkaline earth metals group (2 A)
The alkaline earth elements are the metallic elements found in the second group of s-block after the group (1 A). They are located on the left side of the modern periodic table.
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,...
Attempts of elements classification, Mendeleev, Moseley & Modern periodic table
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.
Importance of the water and its structure
The importance of the water There are no living organisms that can live without water as it is the medium through which all the vital processes take place, The water in the oceans and...
