During the period 1811-1886, the halogens were discovered. They are non-metallic elements such as: Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I) and astatine (At) which are the members of the halogen family. This family constitutes the group 17 of the periodic table. The word halogens have been derived from the Greek word “Halo” that … Read more
Group 15 of the modified long form periodic table consists of five elements: Nitrogen (N), Phosphorus (P), Arsenic (As), Antimony (Sb) and Bismuth (Bi). These elements are collectively called the elements of nitrogen family. Nitrogen and Phosphorus are non-metals, arsenic and antimony are semi-metals or metalloids: bismuth is metallic although not so strong. Some important … Read more
Group 13 of the long form of the periodic table consists of five elements: Boron (B), Aluminium (Al), Gallium (Ga), Indium (In) and Thallium (Tl). All these elements collectively are named as boron group elements, because Boron (B) is the first element of this group. These elements form the first group of the p-block elements. … Read more
The long form of periodic table can be divided into four main blocks. These four main blocks are s, p, d and f –blocks. The division of elements into blocks is purely based upon the electronic configuration. The nature of the subshell in which the last electron of that atom enters, determines the block to … Read more
A binary compound of oxygen with another element is known as an oxide. There are various types of oxides. They are as follows: A) Basic oxides: It is formed with alkali metals, alkaline earth metals (except Be) and transition metals generally. These oxides give bases with water. These oxides react with acids to form salt … Read more