Science > Chemistry > States of Matter > Introducion A matter is defined as anything that has mass, which occupies space and may be perceived by senses. There are three states of matter, viz. (a) solid, (b) liquid, and (c) gaseous states. Whatever may be the state of matter, it is composed of particles. In […]
Science > Chemistry > States of Matter > Change of State of a Substance In this article, we shall study a change in the state of a substance. Melting (Solid → Liquid): The process of change of solid substance into its liquid state is called melting or fusion. The constant temperature at which the solid […]
Science > Chemistry > States of Matter > Introducion A matter is defined as anything that has mass, which occupies space and may be perceived by senses. There are three states of matter, viz. (a) solid, (b) liquid, and (c) gaseous states. Historical Perspective of States of Matter: Ancient Indian philosophers suggested that all the […]
Science > Chemistry > Solid State > Semiconductors On the basis of electrical conductivity, substances can be classified into three types conductors, insulators, and semiconductors. In this article, we shall have a brief idea of semiconductors. Semiconductors are the substances whose conductivity lies between the conductors and insulators e.g. Germanium, Silicon, etc. They are covalent solids. […]
Science > Chemistry > Solid State > Electrical Properties of Solids In the last article, we have studied the dielectric properties of solids. In this article, we shall study the electrical properties of solids. Electrical Conductivity: The electrical conductivity of solids is due to the motion of electron or positive holes. The conductivity due to the motion […]
Science > Chemistry > Solid State > Magnetic Properties of Solids In the last article, we have studied the magnetic properties of solids. In this article, we shall study the dielectric properties of solids. Source of Dielectric Properties of Solids: In insulators, electrons in the individual atom or ion are bound to corresponding nuclei. Hence […]
Science > Chemistry > Solid State > Magnetic Properties of Solids In this article, we shall study the magnetic properties of solids, classification of solids on the basis of their magnetic properties. Every substance has some magnetic properties associated with it. The origin of these properties lies in the magnetic moments associated with the electrons. […]
Science > Chemistry > Solid State > Defects in Crystal Structure In this article, we shall study defects in the crystal structure, sources of defects and their types. Source of Defects in Crystal Structure: At absolute zero, crystals tend to have a tendency to have a perfectly ordered arrangement. This arrangement at absolute zero represents the […]
Science > Chemistry > Solid State > Radius Ratio and its Significance The ratio of the radius of cations (r+) to the radius of the anion (r–) is known as the radius ratio of the ionic solid. The significance of radius ratio: It is useful in predicting the structure of ionic solids. The structure of […]
Science > Chemistry > Solid State > Tetrahedral Voids and Octahedral Voids In this article, we shall study two types of voids formed during hexagonal closed packing namely, a) Tetrahedral voids and b) octahedral voids. Let us consider a closed pack hexagonal packing in the first layer as shown. There are empty spaces between the […]