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Hydrogen report final

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mlm hydrogen report

on 7 May 2010

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Transcript of Hydrogen report final




Element Report




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Name of Element: Hydrogen
Element Symbol: H

Group members: Maggie Grillon, Lily Rivin, Maya Washington

Period: 5
Grade: 8

Presenting day: Friday, May 7
Element number: 1

Atomic Mass: 1

Classification: nonmetal

Group: hydrogen has no assigned group because the properties of hydrogen do not match the properties of any other group. It is set apart.
When hydrogen was discovered:
Hydrogen was discovered as an element in the year 1766 although it had been written about before that.
Where the element was discovered:
Hydrogen was discovered in London, England.
How the element was discovered:
Hydrogen was discovered when he collected it over mercury and described it as "inflammable air from metals."
Who discovered hydrogen:
Robert Boyle, and English chemist, published a paper in 1671 called “New experiments touching the relation betwixt flame and air.” In the paper he described the reaction between iron filings and dilute acids which results in the evolution of gaseous hydrogen, the "inflammable solution of Mars.” It was the first written or known proof of hydrogen. However, it was first recognized by Henry Cavendish as an element in 1766. He is said to be the person who really discovered hydrogen. Hydrogen was named by A. L. Lavoisier in 1783, 17 years after its discovery.
Historical uses for hydrogen
Some uses for hydrogen are rocket fuel, welding, producing hydrochloric acid, filling balloons, and is added to some fats and oils.
Physical Properties
colorless
tasteless
odorless
melting point: -259.20C
boiling point: -252.80C

1)Hydrogen is fourteen and a half times lighter than air.

2)When hydrogen, is under pressure, it behaves and reacts like a metal. Modern uses of hydrogen:
fuel, fertilizer, food, and fat
What the element is used for today:
treating metals, refining, and processing foods
Items that contain hydrogen in present day:
fluoride, hydrogen fluoride, and fluorine
Other substances hydrogen is mixed with to make new substances:
hydrogen is mixed with oxygen to make water

Physical Properties continued
it is a gas under normal conditions
it is lighter than air

Chemical Properties
highly flammable
explosion and combustion can occur when heated
reacts easily with other chemical substances
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