constituent ratio

Chemical Formulae Every chemical substance is known by a specific name. But these names can sometimes be cumbersome, confusing and not provide sufficient information about its chemical composition. To overcome this, each chemical compound is represented by a chemical formula that gives its comp..

A compound cannot be separated into its constituents by mechanical or physical means. For example, if we bring a magnet near a sample of iron sulphide, the iron present in the iron sulphide cannot be separated . Properties of a compound differ entirely from those of its constitu..

Some of the common properties of solids, which distinguish them from other two states of matter, are: Solids are rigid and have definite shapes. Solids have definite volume irrespective of the size or shape of the container in which they are placed. Solids are almost incompressible, having..

The electrostatic field of an ion is nondirectional.Each positive ion attracts several negative ions around it depending upon its size or radius and vice-versa ,resulting in a three dimensional solid aggregate called an ionic crystal in which oppositely charged ions alternate in regular,continuous..

. It is measured in candela or candle power (C.P.) Illuminance or Intensity of illumination (E) of a surface is the luminous flux incident normally on unit area of the surface. E is measured in lux or meter candle and photo or cm candle, 1 photo = 10 4 lux. Luminance of a surface refers to brightne..