Which metal turns black when exposed to light?

It turns black or dark in colour when silver nitrate is exposed to sunlight. ...

No, it turns black when exposed to UV light.

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. ...

because i have no clue

when radium is exposed to air it turns black

When silver salt is exposed to sunlight is turns black.

You are most likely referring to silver which will tarnish with time and often turns black (although depending on the composition of the gas its exposed to it can turn any colour of the rainbow)...

Yes. Radium is actually considered an alkaline earth metal. Its colour is nearly pure white, but when exposed to air, it turns black. Radium is also extremely radioactive. A link is provided to the Wikipedia article on radium. ...

Turns black by photolysis (as in old photographics)

It shouldn't, but it really depends on the amount of chrome and molybdenum in the metal. It also depends on how much moisture it is exposed to. I have a knife made out of chrome-moly and it does oxidise, but it is not destructive to the metal, it is athetic only.(It turns black.) ...

I guess it's getting hotter and then it gets so hot that it burns and then turns black 'caus of heat from the volcanic area. ...

Copper over time will turn a rich green when exposed to air and the elements. ...

The metal might be copper. When copper is heated, it reacts with oxygen in air forming copper oxide which is black in colour. ...

Copper wiring turns black due to oxidation. It is the air reacting with the metal. Copper wiring also sometimes turns green. ...

Silver halogenides are decomposed by light.

It is a chemical change but it can be reversed since that cahnge is only on the surface. It is merely an oxidization that occurs when silver is exposed to oxygen and has no contact with oil (which blocks the pores of the metal from reacting with oxygen). ...

Copper (Cu) is the element that turns green when exposed to moist air.

When a plant is exposed to light, it undergoes photosynthesis. During this process, the plant turns light energy and carbon dioxide into oxygen and sugars for the plant to consume. Therefore, a plant more exposed to light will produce more food for itself, and grow more. ...

i have no clue and i dont care

For example silver bromide or chloride.

It turns Black and dark

Strontium is a soft silver-white or yellowish metallic element that is highly reactive chemically. The metal turns yellow when exposed to air. ...

White cloth Black paper absorbs more because black absorbs all colours of light and turns the light into heat. ...

The reason that copper turns green is the same reason the metal rusts, oxidization. Both metal and copper oxidize when exposed to oxygen and this is a natural process. Copper that is exposed to the outside environment is more likely to turn green and that is why copper vases and decorative pieces in gardens are often green. Copper is a metal that does not react with water (H2O), but the oxygen of the air will react slowly at room temperature to...

Oil in a combustion engine plays an import part by keeping metal on metal parts lubricated. The oil turns black over time due to the impurities it picks up from the combustion cycle. ...