common chemical compounds

Formula Writing and Nomenclature of Co-ordination Compounds - Rules for formula writing: 1) Formula of the cation must be written first followed by anion. 2) The Co-ordination sphere is written in square brackets. 3) Within the co-ordination sphere the sequence is (Metal atom, anionic, ne..

Calculations Based on Chemical Equations - In a chemical reaction there is a rearrangement of particles. This rearrangement of particles, results in drastic changes in the properties of the substances. For e.g., sodium and chlorine are very reactive elements. When they combine, ..

Chemical Properties of Metals - Metals are Electropositive Elements Metals are very reactive. Metals tend to loose electrons easily and form positively charged ions; therefore metals are called electropositive elements. Sodium metal forms sodium ions Na + , Mg forms positively charged Mag..

Metals are Electropositive Elements Metals are very reactive. Metals tend to loose electrons easily and form positively charged ions; therefore metals are called electropositive elements. Sodium metal forms sodium ions Na + , Mg forms positively charged Magnesium ions Mg 2+ and aluminium forms al..

As in the case of S, the important oxidation states observed for Se and Te are also 2, +2, +4 and +6. The chalcogenide dianions (E 2 - ) exist only in their compounds with the most electropositive elements. By and large, chalcogens with the exception of polonium, display non-metallic cova..

Some important group trends are: (a) On account of high ionization enthalpies, simple M 4 + ions of the group are not known. (b) Unlike carbon the other elements of the group form compounds having coordination numbers higher than 4 like (SiF 5 ) - , (SiF 6 ) 2 - and (P..

Nitro compounds are reduced to amines either by catalytic hydrogenation or chemically by using a metal and aci..

Palmately Compound Leaves - A palmately compound leaf is one in which all the leaflets arise from a common point at the tip of the petiole. Depending upon the number of leaflets present, the palmately compound leaves can be distinguished into the following ty..

Trends in Chemical Reactivity - Some important group trends are: (a) On account of high ionization enthalpies, simple M 4 + ions of the group are not known. (b) Unlike carbon the other elements of the group form compounds having coordination numbers higher than 4 like (SiF 5 ) -..

Factoids - A chemical compound is always electrically neutral. The positive and negative valencies of the ions/radicals in a compound are equal and balance..