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When metals are exposed to oxygen, they tend to form metal oxides through a process called oxidation. This can lead to the formation of rust on iron and steel, tarnishing on silver, and patina on copper. The formation of these oxides can degrade the metal's surface and decrease its structural integrity over time.
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What metals turn green if exposed to oxygen?
Metals like copper, bronze, and brass can develop a greenish layer known as a patina when exposed to oxygen over time. This greenish layer is typically a result of oxidation and can give these metals a unique and aged appearance.
Do Alkali earth metals react with oxygen?
Yes, alkaline earth metals react with oxygen to form oxides. This reaction is more vigorous than with alkali metals but less than with alkali metals.
Is ferrous metal flammable?
Ferrous metals, such as iron and steel, are not inherently flammable. However, they can become flammable when they are in a finely divided form, such as iron powder or steel wool, and exposed to high temperatures or oxygen. In normal solid form, ferrous metals do not catch fire easily.
What gas in the air makes steel rust?
Oxygen in the air is responsible for causing steel to rust. When exposed to humid conditions, oxygen reacts with iron to form iron oxide, which is more commonly known as rust.
Which two substances can be to compare the reactivity of metals other than acids?
Water and oxygen can be used to compare the reactivity of metals. More reactive metals will react with water to form metal hydroxides and hydrogen gas, and with oxygen to form metal oxides. Less reactive metals may not react with water or oxygen at all.
