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Steeples and roofs might appear green due to the formation of a patina, a greenish layer that develops on copper when exposed to air and moisture over time. A copper square may not appear green if it has been treated to prevent the patina from forming or if it is polished regularly to maintain its original appearance.

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1y ago

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Why do copper compounds usually appear colourless although copper is a transition element?

Sorry, but most copper compounds are some shade of blueor green, not colorless at all!


Why does the Statue of Liberty's outer skin appear green even after restoration?

The natural process of oxidation turned the brown copper into a sea green which cannot be completely reversed. This process occurs when air and water meet the copper plates. The green color is copper carbonate, protecting the copper within from being further damage.


What is the colour of copper selenate?

Copper selenate is typically white in color when in its anhydrous form, but it can appear blue or green when hydrated.


Is copper oxide green or black?

The colour of copper(II) oxide is black, while that of copper(I) oxide is red. The green colour you see on the Statue of Liberty is because carbon dioxide in the air reacted with the copper to produce copper(II) carbonate, which is greenish-blue.


Color of copper phosphate?

Copper phosphate has the chemical symbol Cu3(PO4)2 and is a salt of copper that is created when phosphoric acid is added. The color of this substance can range from blue to green.


Why does the Statue of Liberty's skin appear green even after restoration?

It's aged copper so it's like a penny that's why the statue of liberty is green


How long does green hair last from swimming in a pool?

Hair bleaches in the pool not because of the chlorine, but because of the metals and copper in the water. If the pool has a high concentration of metals and copper, then yes, it will appear or turn a faint green.


What makes fire green?

Fire can appear green when certain chemicals are present in the fuel source. For example, copper compounds can produce a green flame when burned. The green color is due to the emission of specific wavelengths of light as the atoms in the compounds release energy. This phenomenon is commonly observed in pyrotechnics and fireworks displays where different metal salts are used to create colorful flames.


If the green color of the copper coating that covers the statue of liberty is different from the color of a typical copper penny what caused the statue of liberty copper coating to turn green?

Acid in the rain reacted with the copper to turn it green. That is why there is sometimes green on pennies. Acid in the rain reacted with the copper to turn it green. That is why there is sometimes green on pennies. Acid in the rain reacted with the copper to turn it green. That is why there is sometimes green on pennies. Acid in the rain reacted with the copper to turn it green. That is why there is sometimes green on pennies.


Why is copper green when it oxidizes?

Copper turns green when it oxidizes because of the formation of a greenish layer of copper oxide on its surface.


What color does copper give off?

Copper gives off a green flame when burned. So, green.


Why does some water appear green?

Water can appear green due to the presence of algae, which contain chlorophyll pigments that give them a green color. Algal blooms, which can occur due to factors like excess nutrients in the water, can make the water look green or even turquoise. Additionally, water bodies with a high concentration of phytoplankton or other microscopic organisms can also give the water a greenish hue.