The group IV-A (14) in the periodic table is known as ‘Carbon family’ consist of five elements, namely, Carbon (C), Silicon(Si) Germanium (Ge), Tin (Sn) and Lead (Pb). Carbon is the essential constituent of all organic matter, while silicon is an important constituent of inorganic matter. Electronic Configuration of Group IV(14) Elements: Sr.No. Elements Atomic […]
In this article, we shall study the coordination compounds, their terminology, and nomenclature Double Salts: These are the addition molecular compounds which are stable in the solid-state but dissociate into constituent ions in the solution. They are simply a combination of two different salts. e.g., Mohr’S salt, [FeSO4·(NH4)2SO4. 6H2O gets dissociated into Fe2+, NH+4, and SO2-4 ions. […]
In the last article, we have studied the initial classification of elements. In this article, we shall study the modern periodic table. Moseley’s Criteria: Henry Moseley, a physicist from England in the year 1913, observed that when certain metals were bombarded with high-speed electrons, X-rays are emitted. He studied the frequencies of the X-rays emitted and found that […]
In this article, we shall study the initial classification of elements and Mendeleev’s periodic table. Need for Classification of Elements: With the rapid advance and developments in science, the number of discovered elements increased. Due to a large number of elements, it is difficult to study and remember the behaviour and properties of each and every element. Hence attempts have […]
The gaseous compound formed when dry fluorine gas reacts with dry Hydrogen, gas is called hydrogen fluoride. Hydrogen fluoride gas on condensation forms liquid hydrogen fluoride which is also referred to as anhydrous hydrogen fluoride or anhydrous hydrofluoric acid. When vapours of hydrogen fluoride are dissolved in water, the resulting aqueous solution is known as […]
In this article, we shall study halogen member fluorine. Fluorine is positioned in Group 17 and the second period of the periodic table. It is highly reactive. Occurrence: Because of extreme reactivity fluorine does not occur in the free state. It occurs as the fluorides (F–) of certain metals such as Calcium and Aluminium. Its […]
A few elements like carbon, sulphur, gold, platinum, copper, silver, mercury and noble gases, occur in the free state while others in combined forms like oxides, sulphides, carbonates, sulphates, silicates etc. in the earth’s crust. Metallurgy is a branch of chemistry that deals with the processes that are used for the extraction of metals in […]
Science > Chemistry > Third Row Elements > Hydroxides of Third Row Elements In this article, we shall study hydroxides of third row elements. Different types of hydroxides of third-row elements are classified according to their mode of dissociation. According to Arrhenius’s theory, the acid is the substance which gives H+ ions in an aqueous […]
Science > Chemistry > Third Row Elements > Oxides of the Third Row Elements A binary compound of an element with oxygen, in which the oxygen atom is electronegative is called an oxide. e.g. MgO, Al2O3, etc. The oxide in which Oxygen exhibits the normal oxidation state of -2 is called normal oxide. In this article, […]
Science > Chemistry > Third Row Elements > Molecular Solids of the Third Row in this article, we shall study the crystal structure of molecular solids of third perid of periodic table. Molecular solid: The substance in which lattice points are molecules which are held together by means of weak physical forces (van der Waal’s […]