Modern Periodic Table and Its Significance Modern Periodic Table : Henry Moseley, an English physicist found that the atomic number (Z) was the fundamental property of an elements and not the atomic mass for classification of elements. Modern Periodic Law : ‘‘Properties of elements are periodic functions of their atomic numbers, i.e., the number of protons or electrons … [Read more...] about Modern Periodic Table and Its Significance
Chemistry
Why does Diffusion take place
Why does Diffusion take place Diffusion : The spreading out and mixing of a substance with another substance due to the motion of its particles is called diffusion. Diffusion is a property of matter which is based on the motion of its particles. Diffusion is fastest in gases because the particles in gases move very rapidly. The diffusion is slowest in solids because the … [Read more...] about Why does Diffusion take place
How did Mendeleev Arrange the Periodic Table
How did Mendeleev Arrange the Periodic Table Mendeleev's periodic Law and Mendeleev's periodic table While working systematically on the physical and chemical properties of elements, Dmitri Invanovich Mendeleev noticed that properties of elements varied regularly with the atomic mass. He arranged the 63 elements then known in a table on the basis of similarities in … [Read more...] about How did Mendeleev Arrange the Periodic Table
What is meant by the Kinetic Theory of Matter?
What is meant by the Kinetic Theory of Matter? The Kinetic Theory of Matter:The arrangement and movement of particles in solids, liquids and gases are described in the kinetic theory of matter. The kinetic theory of matter is used to explain the changes in the states of matter. The changes in the states of matter are caused by heating or cooling. For example, ice … [Read more...] about What is meant by the Kinetic Theory of Matter?
What is stoichiometry and why is it used in chemistry?
What is stoichiometry and why is it used in chemistry?Stoichiometry is a study of quantitative composition of substances involved in the chemical reactions. A balanced chemical equation can be used to calculate number of moles, number of particles and mass or volume of a reactant or product. By using the information obtained from a balanced chemical equation, it is … [Read more...] about What is stoichiometry and why is it used in chemistry?