Wednesday, 6 February 2013

GOLD FACTS

Gold is a soft,dense , shiny, ductile and malleable metal.Gold is a chemical element with the symbol Au (aurum in Latin, meaning glow of sunrise) and atomic number 79.Gold is found in nature in quartz veins and secondary alluvial deposits as a free metal or in a combined state.Gold occurs, in chemical combination with tellurium, in the minerals calaverite and sylvanite along with silver, and in the mineral nagyagite along with lead, antimony, and sulfur. It occurs with mercury as gold amalgam. It is generally present to a small extent in iron pyrites; galena, the lead sulfide ore that usually contains silver, sometimes also contains appreciable amounts of gold.


Symbol:                            Au
Electron configuration:       [Xe] 4f14 5d10 6s1
Discovered:                      6000 BC
Atomic number:                79
Atomic mass:                    196.96657 ± 0.00004 u
Melting point:                    1,064 °C
Boiling point:                     2,807.0°C (3,80.15°K, 5,084.6°F)
Density @ 293°K:            19.32 grams per cubic centimeter
Crystal structure:               cubic
oxidation states:                 +1, +3

FACTS:--

1.Gold is only 2.5 on the Mohs scale of hardness - about the same as a fingernail. Pure gold is so soft and malleable that a strong man can squeeze it and shape it.  Therefore, gold could be used by artisans around the world for as far back as time can tell.

2.Gold is bright yellow and has a high luster. Apart from copper and caesium it is the only non white colored metal. Gold’s attractive warm colour has led to its widespread use in decoration.

3.Carat weight can be 10, 12, 14, 18, 22, or 24. The higher the number, the greater the purity.

4.Amid recession fears in March 2008, the price of gold topped $1,000 an ounce for the first time in history.

5.The largest gold nugget ever found is the “Welcome Stranger” discovered by John Deason and Richard Oates in Australia on February 5, 1869. The nugget is 10 by 25 inches and yielded 2,248 ounces of pure gold. It was found just two inches below the ground surface
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6.Gold melts at 1064.43° Centigrade. It can conduct both heat and electricity and it never rusts.

7.Seventy-five percent of all gold in circulation has been extracted since 1910.

8.A medical study in France during the early twentieth century suggests that gold is an effective treatment for rheumatoid arthritis.

9.One cubic foot of gold weighs half a ton. The world’s largest gold bar weighs 200 kg (440 lb).

10.By the end of 2008, Google closed at $307.65 a share, while gold closed the year at $866 an ounce.

11.The Greeks thought that gold was a dense combination of water and sunlight.

12.The chemical symbol for gold is AU, from the Latin word aurum meaning “shining dawn” and from Aurora, the Roman goddess of the dawn. In 50 B.C., Romans began issuing gold coins called the Aureusand the smaller solidus.

13.In 1848, while building a saw mill for John Sutter near Sacramento, California, John Marshal discovered flakes of gold. This discovery sparked the California Gold Rush and hastened the settlement of the American West.

14.The purity of gold is measured in carat weight. The term “carat” comes from “carob seed,” which was standard for weighing small quantities in the Middle East. Carats were the fruit of the leguminous carob tree, every single pod of which weighs 1/5 of a gram (200 mg).

15.Khrysos (Gold) is a child of Zeus; neither moth nor rust devoureth it; but the mind of man is devoured by this supreme possession. - 5th century Greek fragment.
 

2 comments:

  1. In New York the gold price rose $5.50 to $1,673.50 yesterday. In Asia on Monday it began to recover a little more to $1,677 and then Fixed at $1,678.00 up $14 and in the euro at €1,240.02 up nearly €14, while the euro was $1.3532. Ahead of New York’s opening, gold was $1,680.65 and in the euro at €1,242.03.
    Buying gold coins online

    ReplyDelete
    Replies
    1. Hi,
      Thanks for your comment about gold prices.

      Delete