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Which metal turns black when exposed to light?

Bromine


What is the black coating on silver metal?

It is silver oxides (Ag2O) or the rust of silver.


How can I blacken metal effectively?

To blacken metal effectively, you can use a process called black oxide coating. This involves immersing the metal in a chemical solution that creates a black layer on the surface. This process helps to protect the metal from corrosion and gives it a sleek black finish.


Q1- please tell you how to remove galvonic metal coating from sensitized paper with affecting the original print under coating?

Q1:- please tell me how to remove galvonic metal coating from sensitized paper with affecting the original print under coating Q2:. please tell me how to remove iodine+ black mixture of vasaline from sensitized paper with out affecting the original print under coating


What is the chemical name for the black coating on an old coin?

The black coating on an old coin is typically referred to as patina, which is a thin layer of oxidation that forms on the surface of metal over time. It can consist of various compounds depending on the metal composition of the coin, such as copper sulfides or oxides.


What does the 'finish' of a firearm mean?

The finish is the metal and/or coating of the metal. Stailess steel or polished stainless steel. Bare metal or blued (looks black), colored case hardened.... etc...


Why is it when a piece of copper is folded squashed and heated in air only the outside of the copper is black?

The black coating you see is a coating of copper oxide, which forms when the hot metal reacts with air. no air can reach the inside, so it does not react to form black copper oxide.


How can I stain metal black effectively?

To stain metal black effectively, you can use a process called blackening or black oxide coating. This involves applying a chemical solution or heat treatment to create a black layer on the metal surface. Make sure to clean and prepare the metal properly before applying the blackening solution to achieve a durable and even black finish.


How can I effectively stain metal black?

To effectively stain metal black, you can use a process called blackening or black oxide coating. This involves applying a chemical solution or heat treatment to create a dark, corrosion-resistant layer on the metal surface. Make sure to clean and prepare the metal properly before applying the blackening solution to achieve a consistent and durable black finish.


What metal goes black in the air?

copper,and some precious metals, when exposed to air, turn black, like silver(completely turns black when exposed to air),gold(black spots appear),and others,maybe platinum.


A metal which is used in coins and slowly goes black in air?

The metal you are referring to is likely copper. When exposed to air, copper reacts with oxygen to form copper oxide, which gives the metal a dark black or greenish color. This process is known as oxidation.


What metal is black does not rust and is magnetic?

The metal that fits this description is iron. When iron is exposed to air and moisture, it forms a black layer called magnetite, which protects it from further corrosion. Additionally, iron is a ferromagnetic material, meaning it can be magnetized.