A chemical compound is a pure chemical substance consisting of two or more different chemical elements and have a unique and defined chemical structure. These compounds consist of a fixed ratio of atoms that are held together in a defined spatial arrangement bychemical bonds. Different kindso of chemical compounds have different kind of bonding. For example some can be molecular compounds held together by covalent bonds where [...]
Test Your Knowledge on Carbons and its Compunds
January 13, 2012 by ·
Carbon is an element found in elemental form and in the combined form.The compounds containing carbon are , in most case , associated with hydrogen . For example hydrocarbons are fuels that produce heat on burning. Carbon compounds are used in some form in almost all aspects of our daily life as we have seen earlier.So [...]
10 Multiple Choice Question on Source of Energy
January 6, 2012 by ·
Sun is the biggest source of energy , however, a number of sources of energy have been discovered and invented by human beings .An energy source is a system which makes energy in a certain way, for instance a hydro-electric station. A hydro-electric station uses the current of the river for the making of electricity.Nuclear energy,wind [...]
Take Your Test on 10 Questions Quiz on Metals & Non-Metals
January 6, 2012 by ·
General physical and chemical properties of chemical elements defines elements as non-metal .Every element in the periodic table can be termed either a metal or a nonmetal. (A few elements with intermediate properties are referred to as metalloids ).Non-metals cannot be hammered or beaten into thin sheets without breaking. Non-metals break into pieces when hammered or stretched. Sulphur, phosphorous are powders [...]
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