Helium
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| The Periodic Table of Elements |
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Welcome to the world of elements. Here you will find loads of data over all the elementsin the most modern periodic table. The Periodic table is yet so large that I will have to make another site. The first element we will see is Hydrogen...
Hydrogen is a tasteless, odorless, colorless gas and one of the most important chemical elements. The hydrogen atomis the smallest and simplest atom known. This atom consists of one proton, which has a positive charge, and one electron, which has a egative charge. Hydrogen has the chemical symbol H. Its atomic number is 1. Its atomic weight is 1.0079. The term hydrogen comes from two Greek words meaning water-former.
Occurrence.
Hydrogen is the most abundant element in the universe. The sun and many other stars consist mostly of hydrogen. The great number of hydrogen atoms in the earth's crust makes it the third most abundant element on the earth, after oxygen and silicon. However, because of the small size of its atoms, hydrogen accounts for less than one percent of the crust's weight, ranking ninth among the elements. Most of this hydrogen is combined wiht other chemical elements, as in water. But pockets of pure hydrogen gas can collect in underround mines and cause violent explosions.
Hydrogrn occurs in almost all organic compounds. Many of the compounds found in plant and animal tissues are organic. Compounds called hydrocarbons contain only hydrogen and carbon. Mixtures of various hydrocarbons make up petroleum and natural gas. Ammonia, most acids, many bases, and most plastics also contain hydrogen.
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