S-block: The s-block elements are metals. Metals are usually solids at room temperature. Metals usually have high melting and boiling points. They are good conductors of heat and electricity. They are malleable (can be flattened into thin sheets by hammering) and ductile. P-block: The p-block contains metals, metalloids (or semi-metals) and non-metals. Non-metals are usually Read more about Types of elements in s, p, d and f blocks[…]
Radial nodes: Radial nodes are nodes inside the orbital lobes Angular nodes: angular nodes are not internal countours of electron probability, but rather are planes that go through the orbital Total number of nodes = n – 1 Total number of Angular nodes = 1 Total number of Radial nodes = (n – 1 – 1) n is Read more about Nodes[…]
The wave mechanical model of atom comes from wave equation. The wave equation describes the electron in motion as a three dimensional wave. This was given by Schrodinger x, y, z are Cartesian coordinates m is mass of electron. V is potential energy of electron E is total energy of electron h is Planck’s constant. Read more about Quantum Mechanical Model[…]
Bohr’s atomic Theory It is based on the application of quantum theory of radiation. Postulates:- 1. The electrons revolve around the nucleus with definite velocity in certain fixed closed paths called orbits. There are numbered as 1, 2, 3, 4…… (Or) K, L, M, N from the Nucleus. 2. The angular momentum of electron is an Read more about Bohr’s Atomic Theory[…]
Group IIA Elements: Beryllium (Atomic number – 4) Magnesium (Atomic number – 12) Calcium (Atomic number – 20) Strontium (Atomic number – 38) Barium (Atomic number – 56) Radium (Atomic number – 88) Have 2 electrons in the outermost orbit. By loosing two electrons they form stable + 2 ions. They are divalent and show Read more about Explanation Of S – Block (Group II A Elements)[…]
Group I A Elements: Hydrogen (Atomic number – 1) Lithium (Atomic number – 3) Sodium (Atomic number – 11) Potassium (Atomic number – 19) Rubidium (Atomic number – 37) Strontium (Atomic number – 55) Francium (Atomic number – 87) Elements of group I A and II A are known as s – block elements. Except Hydrogen Read more about Explanation Of S-Block (Group IA) Elements[…]
Hello MyRank Viewers, here are Some Important Qualitative Analysis Tests and Results 1. CHARCOAL CAVITY TEST: Residue Metallic Bead Inference Yellow when hot, white when cold Zn2+ Brown when hot, yellow when cold Green bead, Makes the paper black Pb2+ No characteristics residue Red beads / scales Cu2+ White residue, glows on heating Ba2+/ Sr2+/ Read more about Some Important Qualitative Analysis Tests And Results………[…]
Ever wondered why Thermo Dynamics is named so? THERMO → Heat, Dynamics → Motion or flow Basically, thermodynamics deals with all changes in energy or transfers of energy that accompany physical and chemical processes. Important terms in Thermo Dynamics: System, surrounding and Boundary: A system is defined as specific part of matter which is under experimental investigation and the Read more about Thermo dynamics[…]
Hello Guys…!! Here is a fast over-view of Laws of Thermodynamics. Zeroth Law of Thermo dynamics: Let A, B, C be different bodies having different temperatures. If heat exchange is possible between A and B and B and C then it is also possible between A and C.Work and Heat: Work: It is the mode of Read more about Laws Of Thermodynamics…..[…]
Guys…!! Looking out for something important to learn within no time..?? Here is a fast over-view of open chain reactions of Glucose which can be grasped quickly…!! 1. Reaction of glucose with phenyl hydrazine:In the above reaction is with the given reagent first two carbons get – NHPh 2. Reaction of Glucose with Bromine Water: Read more about A fast overview of open chain reactions of Glucose[…]