Aluminum
Copper turns green because if forms a coating of copper acetate upon exposure to air and moisture
Titanium can react with air, water, acids and even the halogens given the right conditions.
that's so simple, rust
copper oxide. when it reacts with the oxygen in the air it produces copper oxide
That is because it is hygroscopic in nature and it absorbs moisture from air. If exposed to open air, it tends to become liquid. That is why, it is often called as deliquescent substance (deliquescent substances are substances which absorbs an excessive amount of water from its surroundings/ atmosphere that it forms a liquid.)
the answer is mucus
Copper turns green because if forms a coating of copper acetate upon exposure to air and moisture
Cotton is the protective coating around cotton seeds. It forms as the cotton plant grows into a mature shrub.
Titanium can react with air, water, acids and even the halogens given the right conditions.
a solid substance (s), a group 3 element, that forms a positive ion. it reacts with air, although this is not commonly known as it quickly forms a protective coating of aluminum oxide.
water repellent forms a smooth coating over the tiny holes in fabric. the coating is so smooth that the gaps in it are smaller than water molecules. because the water molecules cannot pass through the protective coating, they stay on the surface where they can be easily wiped away.
A capsule is the protective coating in the outside of a bacteria cell, and a n endospore is a type of small spore that forms inside the cell of some bacteria.
The class of nutrient that is necessary for production of certain hormones and that forms a coating on nerves is
The ozone forms a protective layer. It is present as ozone layer.
Plaque
Placenta.
A stable, substantially inert oxide film provides the material with outstanding resistance to corrosion in a wide range of aggressive media. Whenever fresh titanium is exposed to the atmosphere or to any environment containing oxygen, it immediately acquires a thin tenacious film of oxide.