Main menu

Pages

Gold: Properties – Facts – Color - real and fake

 

Gold: Properties – Facts – Color - real and fake  What is the element of gold?

Gold element definition

Gold is known as that shiny, lustrous element, and one of the most important and most valuable elements on the face of the earth. Gold belongs to the group of transition metals and is located in the same group to which the elements silver and copper belong. Gold is one of the oldest elements known to man since ancient times. It goes Some say that it was known before 3400 BC by the Egyptians, and since ancient times gold has been a symbol of wealth and beauty; The Egyptians were collecting gold only to cover the coffin of the deceased Pharaoh, as 112 kg of gold was found in the coffin of Tutankhamun, the ruler of Egypt in the past.[1]

 

 

Gold Element Properties

Gold as a chemical element possesses some properties that distinguish it from other elements, and the most important of these elements are the following:[2]

1.      The atomic number of gold is 79; The atomic number is defined as the number of protons in an element's nucleus.

2.     The chemical symbol for the element on the periodic table is Au.

3.     The atomic weight of gold is 196.9665; It means the average mass of the atom.

4.     The density of gold is 19.3 g/cm3.

5.     The physical state of the element at room temperature is the solid state.

6.     The boiling point of gold is 2,850 degrees Celsius.

7.      The melting point of gold is 1064.18 degrees Celsius.

8.     The number of isotopes of the element gold, which expresses the atoms belonging to the same elements with a difference in the number of neutrons, ranges between 18-59; Of these, only one isotope is stable, but many synthetic isotopes of gold remain stable for microseconds or milliseconds before they decay into other elements.

 

 

Some facts about the element gold

Here are some facts related to the element of gold: [3]

1.      Gold is the only element that has a yellow or golden color, and other elements may have the color of gold, but after oxidation or reaction with other chemicals.

2.     The symbol for the element gold, Au, is derived from the Latin term Aurum, which means bright dawn or the glow of sunrise, and the word “gold” is of Germanic origin and means yellow or green.

3.     The element of gold is known as an element that can be stretched and elongated, and gold is considered the most flexible, ductile and malleable element. It is possible to form one ounce of gold to a thin sheet of 27.8 square meters.

4.     Gold is one of the heaviest and densest elements, although it is not considered toxic, foods and drinks may contain some gold flakes.

5.     gold is a noble element; This means that it is chemically inert and inactive. It is also characterized by its resistance to air, moisture and acidic conditions. Hydrochloronitric, known as aqua regia, may be used to dissolve the element gold.

6.     Despite the monetary and financial importance of gold, it is also used in many electrical, electronic, dental and glass industries.

 

 

Gold color

The element of gold is distinguished by its bright yellow color, and this is one of the qualities that made it an element of exceptional value through different eras; Thanks to its attractiveness in terms of color and brightness, and its tremendous durability and malleability, in addition to its ease of existence in nature as a free and pure element, and due to its unique qualities, gold was the only universally accepted material in the field of commodity and commodity exchange.

The element of gold also played a major role in global financial systems; Gold bars and coins made of gold made up the high-denomination coins, and from the seventies of the nineteenth century until the First World War, gold was the main financial standard in the world.[4]

 

 

Distinguishing between real and fake gold

Some tests can be performed to distinguish between real and fake  gold, and the most important of these tests are:[5]

 

1. Using a water pot

The gold piece is dropped into a pot of water, and if the piece falls directly to the bottom, it means that it is original; Because real gold has a higher density, fake gold is lighter and will float on the surface of the water.

 

2. Using a magnet

A strong magnet can be used to verify the magnetism of the gold piece, and if it is attracted, it means that it is not original or not pure; Because pure gold is not attracted to magnets.

 

3. Ceramic plate test

The gold piece is rubbed with smooth ceramic. If the gold pieces leave some black lines on the ceramic, it means that they are not original, while the golden lines indicate that they are original.

 

4. Nitric acid test

Gold is characterized by the inability of acids to affect it, and therefore it is recommended to examine it in nitric acid; If the piece is dissolved in it, this is sufficient evidence that it is not original gold, and the person must take care when doing this test, because nitric acid works to dissolve everything that is not gold.[6]

 

5. Vinegar test

A person can use white vinegar to clean metals, and it can also be used to find out whether a piece of gold is real or fine, where the following steps can be followed:[7]

·       Pour the white vinegar into a glass beaker, being careful not to add water.

·       Put a piece of gold in a cup of white vinegar.

·       Leave the gold piece for about 15 minutes.

·       Remove the gold ring and wash it with water.

 

Note: Real gold will shine while fake gold will change color in response to the vinegar.[7]

 

 

6. Skin discoloration test

Gold is considered fake if the skin color changes to black or green, but this test is not considered reliable or accurate because some people are sensitive to gold, or a person may suffer from an allergy to some alloys found in gold as well.[8]

 

 

7. Consultation with a professional

A jewelry maker or a professional can determine whether the gold is real or fake, as this method is the surest proven method at all, and in some cases a person may not have to pay anything to determine whether the gold is real or not.[8]

 

 

 

References

1.      Justin A. (14-2-2018), "What is Gold? - Definition, Properties & Uses"، www.study.com, Retrieved 28-4-2019. Edited.

2.     Stephanie Pappas (15-4-2016), "Facts About Gold"، www.livescience.com, Retrieved 28-9-2019. Edited.

3.     Anne Marie Helmenstine (7-5-2018), "10 Interesting Gold Facts"، www.thoughtco.com, Retrieved 28-4-2019. Edited.

4.     "Gold", www.britannica.com, Retrieved 7-5-2019. Edited.

5.     "How to Tell if Gold Is Real", www.wikihow.com, Retrieved 14-6-2019. Edited.

6.     "How to Tell if Gold Is Real", www.wikihow.com, Retrieved 22-9-2018. Edited

7.      Connie s Owens, "How Do You Use Vinegar to Find Out If a Ring Is Real Gold or Not?"، www.leaf.tv, Retrieved 22-9-2018. Edited.

8.     Laurie Brenner, "How to Test for Real Gold"، www.ehow.com, Retrieved 22-9-2018. Edited.

 

Comments

contents title