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FIRST FIVE ELEMENTS We all are aware or might have heard about the names of 118 elements and the periodic table. We might know the positions of the elements in the periodic table but do we know some of the properties of these elements. Here I have tried to give you some of the properties of first five elements of the periodic table. They are as follows- 1) HYDROGEN LATIN NUMBER- HYDROGENIUM ENGLISH NAME- HYDROGEN YEAR DISCOVERED- 1766 DISCOVERED BY- HENRY CAVENDISH NUMBER OF ELECTRON- 1 NUMBER OF PROTONS- 1 NUMBER OF ELECTRON S- 0 Hydrogen is a chemical element of symbol- 'H' and has atomic number of 1. The atomic weight of hydrogen is 1.00794u, Hydrogen is the lightest element of the periodic table. It is the most abundant element in the universe. It is a monoatomic element. 2) HELIUM LATIN NUMBER-  HELIUM ENGLISH NAME-  HELIUM YEAR DISCOVERED-  1895 DISCOVERED BY-  Pierre Jules Cesar Janssen, Joseph Norman Lockyer NUMBER OF ELECTRON-  2 NUMBER OF PROTONS-  2 NUMBER OF ELECTRO

 GOOD FUELS WITHOUT AN END TO THE BURNING OF FOSSIL FUELS, COAL ESPECIALLY, MOST OF US WILL LIVE SHORTER LIVES. I AM HOPEFUL BUT VERY, VERY CONCERNED  All your questions like- Write it's properties to find whether it is clean fuel or not and  Some commercial uses of fuel, will be answered here, enjoy reading. Some terms before starting- CALORIFIC VALUE- The amount of heat produced by burning a unit mass of the fuel completely is known as its CALORIFIC VALUE. IGNITION TEMPERATURE- The minimum temperature to which a fuel must be heated so that it may catch fire and start burning, is known as IGNITION TEMPERATURE. The definition of a good fuel cannot be given in one line or sentence. There are various conditions that makes a fuel good. We also need to keep in mind that, by saying the term 'GOOD FUEL' we are comparing one fuel with another. None of the fuel can be the best, but can be better in comparison to another. CHARACTERSTICS OF A GOOD FUEL- HIGH CALORIFIC VALUE- A good f

EVEN THE DIAMOND COULDN'T SHINE ON THEIR OWN BUT THEY REFLECT, BUT THE BURNING COAL DID!!   WHAT IS A COAL? Coal can be described as a complex mixture of compounds of CARBON, HYDROGEN and OXYGEN and some free carbon. Some small amounts of sulphur and nitrogen are also be present in coal. It is a combustible black sedimentary rock and is formed as rock strata. TYPES OF COALS- Coal is found in variety of forms depending on the degrees of compression and the depth and time of burial. There are mainly four types of coal, namely- PEAT - Decaying plants in swamps produce peat. LIGNITE - Lignite is a low grade brown coal, which is soft with high moisture content. BITUMINOUS- Coal that has been buried deep and subjected to high pressure and increased temperature is bituminous coal. ANTHRACITE- Anthracite is the highest quality coal. HOW COAL MADE INDUSTRIAL REVOLUTION POSSIBLE- We all know that, in ancient times wood was the most common source of energy. The energy of flowing water and win