properties and changes of properties in matter

A solid has certain characteristics: According to modern theory, the molecules of a solid are fixed in relation to each other. They vibrate in place, but do not wander around. This accounts for the fact that a solid keeps its own shape. Solids are usually crystalline. A solid is a crystalline subst..

Today the fact that all matter is made up of atoms is universally accepted. Realisation of the atomic constituents of matter began in 1828 when Scottish botanist Robert Brown observed a random ceaseless motion of pollen grains suspended in a liquid. Many macroscopic p..

All around us are substances that are made of matter. Matter has mass and occupies some space. Different kinds of substances are made up of different matter. Matter can be thus classified in many ways. Two basic classifications of matter are b..

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..

Summary Matter is anything that occupies space and has mass Element is a pure substance, which can neither be decomposed nor built from simpler substances by any physical or chemical means. It contains only one kind of atom. Broadly speaking, elements can be divided into metals..

Wave Nature of Particles - The suggestion that matter may have wave like properties was first put forwarded in 1924-1925 by Louis De Broglie. He argued that if light, which consists of waves according to classical picture, can sometimes behave like particles, then it should be p..

Beryllium halides are covalent while all other halides are ionic and are readily soluble in water. BeCl 2 is relatively low melting solid and volatile while others have high melting points. BaCl 2 has very high melting point. BeCl 2 is soluble in organic solvents due to its covalency. ..

1. Calcium oxide is a white amorphous solid. 2. It is not decomposed further when heated, but produces a white brilliant light above 2732 o F. This light is called lime light. 3. It combines vigorously with water to form slaked lime (Calcium hydroxide). The process is called "Slaking of lime". It i..

Polyethylene has a low softening point of 383K and a low specific gravity of 0.22. The material is tough flexible highly insulating water resistin..

Thiokol rubber is resistant to the action of oxygen and ozone. It is also resistant to the action of petrol, lubricants and solvent..