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History and properties

Susan Hooten

on 14 May 2010

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Transcript of HYDROGEN

The word 'HYDROGEN' is derived from French origins. It means 'water maker'. . . . The first part, 'hydro' is from the Greek word “hudor” It means 'water'. and the last part is from “gennen” . . . It means 'to generate'. A French chemist named Antoine Lavoisier
gave the element its name. He also proved that
water was made of HYDROGEN & OXYGEN It's symbol is H HYDROGEN's Atomic Number is 1 Atomic Weight 1.0079 The number of valence electrons
in a neutral atom is also It is the first element listed and
it stands alone on the top left
corner of the table. It is classified as an element in the 'Non-Metals' section which can be located in groups 14,15 and 16 of the PERIODIC TABLE OF ELEMENTS Interesting facts: > Hydrogen is the lightest of all gases AND it's the most abundant element in the universe! Two very common compounds it forms are 1. H2O (water) Naturally occurring
2. H1O (peroxide)Both naturally occurring and man-made > By combining Oxygen, Carbon, and Hydrogen,
any kind of alcohol can be formed. (Both naturally occurring and man made)

> Different combinations of Carbon Hydrogen, and Oxygen form various carbohydrates,
and by adding nitrogen, proteins can be formed. (Naturally occurring)

> A chain of hundreds to thousands of carbons and hydrogens make plastic.
or hydrocarbons. (Man made) ALSO simple protein molecule
(lavender parts are hydrogen) Humans could not live without HYDROGEN > 10% of our bodies are made up of it. > We could not live without water. (H2O) Hydrogen compounds readily with carbon, oxygen, and nitrogen. When one molecule of hydrogen combines with one molecule of oxygen... you get HYDROGEN PEROXIDE And when two molecule of hydrogen combine with one molecule of oxygen... you get WATER When hydrogen is combined with both oxygen and carbon... you get CARBOHYDRATES And when hydrogen is combined with oxygen, carbon and nitrogen... you get PROTEINS Other simple combinations of hydrogen, carbon and oxygen will form: These alcohols provide many uses including fuel
for vehicles of many kinds. Hydrogen was discovered by Henry Cavendish in 1776. He eventually came to believe it was pure phlogiston, and he called it 'inflammable air'. He showed that it produced a dew, which appeared to be water, upon being burned. He was not the one to give it its current name. This experiment was repeated by Lavosier, another contemporary scientist who named the gas hydrogen and went on to prove that water was made of hydrogen and oxygen. Cavendish used sophisticated equipment and perfected ways to trap and analyze gases. He is best known for establishing an accurate composition of the atmosphere and the mean density of the earth.
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