basic elements and compounds

. Metalloids are the elements, which have properties that lie between those of metals and non-metals, e.g., arsenic, antimony, etc. Molecules of elements may consist of single atom, two atoms, or even more. All the hundreds of thousands of compounds existing, and produ..

An element is defined as a pure substance as it is made up of only one kind of atoms having the same atomic number. The smallest particle of an element is the atom, which has all the properties of that element. It cannot be further reduced to simpler substances by ord..

Elements, Compounds and Mixtures - According to the chemical classification of matter there are two main categories: Pure substances Mixtur..

>Pure substances can be classified into elements and compounds. Lavoisier, a French chemist, was the first to do this on the basis of quantitative studies. He showed that when we heat mercuric oxide it changes into mercury and oxygen. Mercuric oxide is a compound becau..

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Pure and Impure Substances - All matter can be broadly divided into two major groups "Pure" and "Impure". The term 'purity' has quite a different meaning in chemistry than in our day-to-day life. Normally when we refer to pure water, pure milk, etc., what is implied is that the water, milk etc., ar..

A compound is a pure substance made up of two or more elements combined in a definite proportion by mass, which could be split by suitable chemical method..

A compound is a pure substance that is formed by the combination of atoms of two or more elements by either transfer or by sharing of electrons. The atoms of the different elements in a compound are chemically combined in a fixed and constant proportion. If t..