noble gases inert gases physical and chemical properties

Scientists theorize that the earth began as a waterless mass of rock surrounded by a cloud of gas. Radioactive materials in the rock and increasing pressure in the earth's interior gradually produced enough heat to melt the interior of the earth. The heavy materials such as iron, then sank. The lig..

. To sum it up, the kinetic theory of matter is based upon the following points: Matter consists of molecules. These are the smallest particles, which are capable of free existence and retain all the chemical properties of the parent substance. The molecules are always in a stat..

We know that the properties of a medium that govern the propagation of a mechanical wave are: a restoring force an inertial mass The restoring force acting on the particles of the medium is intimately connected to the approximate elastic modulus of the medium and the inertial mass, to its..

The glass discharge tube is filled with a 80%-20% mixture of the inert gases helium and neo..

Matter and Materials - Matter exists in several phases. If we look at all objects around us, we perceive that some materials have a definite shape and occupy a definite amount of space or volume. We call these materials solids and we can name many objects that are solids. We say that solids have a ..

States of Matter - Normally matter exists in three forms: Solid Liquid Gases Heat energy can bring about a change of state in matter from solid to liquid and liquid to gaseous state. Suppose a solid is heated continuously at constant pressure, its temperature goes on increasing till it st..

When two solid surfaces slide over each other, a frictional force acts between them that opposes the relative motion of the bodies. Similarly, when a layer of a liquid slips on another layer the two exert a tangential force on another. This opposes their motion. The property of a liquid ..

This is a portable form of Leclanche Cell. A moist paste of NH 4 Cl and ZnCl 2 is contained in a zinc vessel acting as the negative electrode. ZnCl 2 is added to the electrolyte NH 4 Cl. It keeps the paste moist because it is highly hygroscopic. The top is sealed with shellac or pitch so that paste..

. In chemical calculations, volumes are often expressed in litres (L) and pressures in atmospheres (atm) in this system, to four significant digits, We can express the ideal gas equation, equation (3), in terms of the mass m t o t of gas, using m t o t =nM from equation (2): -----(..

. The hump produced near the hand begins to move away from the hand. If the hand is repeatedly moved up and down, then instead of a pulse, a succession of pulses will follow one another as shown in the above figure. The particles of the rope move up and down, while the wave travels horizontally alo..