gold-physical and chemical properties

Go down

gold-physical and chemical properties

Post  gerry on Tue May 18, 2010 2:20 pm

my topic is about gold do anyone have an idea that where gold is found at

http://gerry10.blinkweb.com


Last edited by gerry on Wed May 19, 2010 11:15 am; edited 1 time in total

gerry

Posts : 27
Join date : 2010-05-12

View user profile

Back to top Go down

Re: gold-physical and chemical properties

Post  N6I0c8k on Tue May 18, 2010 2:33 pm

you could go to google and look for facts about youre topic!!

N6I0c8k

Posts : 8
Join date : 2010-05-14

View user profile

Back to top Go down

Re: gold-physical and chemical properties

Post  gerry on Tue May 18, 2010 2:50 pm

nice idea lol

gerry

Posts : 27
Join date : 2010-05-12

View user profile

Back to top Go down

Everything on GOLD.

Post  HBKings10 on Tue May 18, 2010 9:48 pm

Gold
Atomic Number: 79
Symbol: Au
Atomic Weight: 196.9665
Discovery: known since prehistoric time
Electron Configuration: [Xe]6s14f145d10
Word Origin: Sanskrit Jval; Anglo-Saxon gold; meaning gold - also Latin aurum, shining dawn
Isotopes: There are 18 isotopes of gold. Gold-198, with a half-life of 2.7 days, has been used to treat cancer and other illnesses.
Density (g/cc): 19.3
Melting Point (°K): 1337.58
Boiling Point (°K): 3080
Appearance: soft, malleable, yellow metal
Atomic Radius (pm): 146
Atomic Volume (cc/mol): 10.2
Covalent Radius (pm): 134
Ionic Radius: 85 (+3e) 137 (+1e)
Specific Heat (@20°C J/g mol): 0.129
Fusion Heat (kJ/mol): 12.68
Evaporation Heat (kJ/mol): ~340
Debye Temperature (°K): 170.00
Pauling Negativity Number: 2.54
First Ionizing Energy (kJ/mol): 889.3
Oxidation States: 3, 1
Lattice Structure: Face-Centered Cubic (FCC)
Lattice Constant (Å): 4.080
Specific Gravity (20°C): 18.88
Properties: The melting point of gold is an assigned value, which serves as a calibration point for the International Temperature Scale and International Practical Temperature Scale. In mass, gold is a yellow-colored metal, although it may be black, ruby, or purple when finely divided. Gold is the most malleable and ductile metal. One ounce of gold can be beaten out to 300 ft2. Gold is a good conductor of electricity and heat. It is not affected by exposure to air or to most reagents. It is inert and a good reflector of infrared radiation. Gold is usually alloyed to increase its strength. Pure gold is measured in troy weight, but when gold is alloyed with other metals the term karat is used to express the amount of gold present.
Uses: Gold is used in coinage and is the standard for many monetary systems. Gold is used for jewelry, dental work, plating, and reflectors. Chlorauric acid (HAuCl4) is used in photography for toning silver images. Disodium aurothiomalate, administered intramuscularly, is a treatment for arthritis.
Sources: Gold is found as the free metal and in tellurides. It is widely distributed and almost always associated with pyrite or quartz. Gold is found in veins and in alluvial deposits. Gold occurs in sea water in the amount of 0.1 to 2 mg/ton, depending on the location of the sample.
avatar
HBKings10

Posts : 9
Join date : 2010-05-18
Location : Arlington

View user profile

Back to top Go down

Re: gold-physical and chemical properties

Post  gerry on Wed May 19, 2010 10:35 am

thanks for thar information

gerry

Posts : 27
Join date : 2010-05-12

View user profile

Back to top Go down

Re: gold-physical and chemical properties

Post  Trey on Thu May 20, 2010 5:39 pm

Look up gold rush in california.

Trey

Posts : 3
Join date : 2010-05-20

View user profile

Back to top Go down

Re: gold-physical and chemical properties

Post  moore_devin@yahoo.com on Thu May 20, 2010 5:50 pm

In the ocean there alots of treasure in the world oceans

moore_devin@yahoo.com

Posts : 14
Join date : 2010-05-18
Age : 24
Location : Arlington,TX

View user profile http://kobebryant.blinkweb.com/

Back to top Go down

Re: gold-physical and chemical properties

Post  garrett on Fri May 21, 2010 3:52 pm

Nice job lots of information. cool topic
avatar
garrett

Posts : 37
Join date : 2010-05-03
Location : texas

View user profile

Back to top Go down

Re: gold-physical and chemical properties

Post  Mr. Anthony on Sat May 22, 2010 10:35 pm

The web page is a huge run-on paragraph that is very difficult to read. You should try to break it up into smaller paragraphs and add a few pictures to make it more appealing to the eye.
avatar
Mr. Anthony

Posts : 78
Join date : 2010-04-27

View user profile

Back to top Go down

Re: gold-physical and chemical properties

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum