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Periodic Classification of Elements Introduction
Introduction - At the turn of the nineteenth century, about 30 elements were known. 50 years later by the 1850s, scientists had discovered sixty three chemical elements and the numbers kept increasing. With the discovery and study of more and more elements an..
d and f - block Elements Introduction
Introduction - The elements that lie in between S-block and P-block are the d-block elements. These elements are called transition elements as they show transitional properties between s and p-block elements. These elements conta..
Group 16 Elements (Chalcogens) - Introduction
Group 16 Elements (Chalcogens) - Introduction - Oxygen, sulphur, selenium, tellurium and polonium constitute the group 16 of the periodic table of elements. The first four elements are collectively called CHALCOGENS. The name derives from the Greek word for b..
Group 16 Elements (Chalcogens) - Introduction
Oxygen, sulphur, selenium, tellurium and polonium constitute the group 16 of the periodic table of elements. The first four elements are collectively called CHALCOGENS. The name derives from the Greek word for bronze and points to the association of sulphur and its congene..
Group 13 Elements (Boron Family) - Introduction
Group 13 of the periodic table consists of the elements boron (B), aluminium (Al), gallium (Ga), indium (In) and thallium (Tl). Except boron, which is classified as a non-metal, all other elements of this group are metal..
Group 18 Elements (Noble Gases) - Introduction
The elements helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe) and radon (Rn) are grouped together in Group 18 of the Periodic Table. All of these are gaseous under ordinary conditions of temperature and pressure. The last number of the group, radon is obtained from radioactive..
Group 18 Elements (Noble Gases) - Introduction
The elements helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe) and radon (Rn) are grouped together in Group 18 of the Periodic Table. All of these are gaseous under ordinary conditions of temperature and pressure. The last number of the group, radon is obtained from radio..
Group 14 Elements (Carbon Family) - Introduction
Carbon (C), silicon (Si), germanium (Ge), tin (Sn) and lead (Pb) constitute the group 14 of the periodic table. This group is known as carbon famil..
Group 17 Elements (The Halogen Family) - Introduction
Group 17 of the periodic table contains the elements fluorine, chlorine, bromine, iodine and astatine. These elements are collectively known as the HALOGENS. This name is derived from two Greek words Halo and Gens meaning 'salt producing'. Halogens are among the most react..
Introduction
There are more than hundred elements around us. But, we do not find these elements in their native form. This is because most of these elements are highly reactive. They interact with each other to form simple or complex substances. Only elements with t..
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