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Mercury vapor streetlights, used since the 1940s, glow a greenish white.

Sodium vapor streetlights, which have gradually replaced most of the MV streetlights in the US, glow orange.

Another two, metal halide and LED, glow completely white.

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Q: How might you distinguish a sodium vapor streetlight from a mercury vapor streetlight?
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Continue Learning about Physics

Green light emitted by excited mercury vapor corresponds to a particular energy transition in the mercury atom a more energetic transition might emit?

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How does a thermomether works?

A mercury thermometer (like the kind a medic might use) is a thin glass tube filled with the metallic element mercury, which is a liquid. The rate at which mercury expands with heat is known and happens at a constant rate, so the movement of the mercury column up and down the tube can be read off at a scale on the side. Because mercury is relatively dense, it isn't affected too much by changes in atmospheric pressure.


Is mercury red in thermometers?

The planet Mercury is grey, similar in colour and general appearance to our moon. Red Mercury is a chemical made of Iodine and Mercury. It was used as a medicine a long time ago before people realised it was actually poisonous. It is either in the form Mercury(I) iodide or Mercury(II) iodide.


Difference between mercury and alcohol?

Mercury is an element, a metal. Alcohol is the name of a familty of organic compounds made up of carbon, oxygen, and hydrogen atoms in various combinations. The only obvious similarity of the two substances is that some alcohols (ethyl alcohol, or ethanol, C2H5OH, for example ) share a common freezing point with mercury of about minus 40 degrees (Celsius or Fahrenheit), making them suitable for use in outdoor thermometers.


What are the three most poisonous elements?

Some of the poisonous elements areFLOURINE, ARSENIC, MERCURY, LEAD,-- ANSWER --The following elements are poisonousAluminumAntimonyArsenic (metalloid)BariumBerylliumCadmiumChlorineHexavalent Chromium Cr6+LeadMercuryOsmiumThalliumVanadiumPolonium (metalloid)ThoriumRadiumUraniumTransuranium elements (e.g., polonium, americium)Radioactive isotopes of metals that might not otherwise be highly toxic (e.g., cobalt-60, strontium-90)

Related questions

What unreactive metal is also a liquid?

i think it might be ----------sodium its Mercury. i did this in science.


Is there mercury in a computer?

Older computers might have mercury, but most modern computers are Mercury-Free.


Does Mercury have cloud conditions that might exist?

No, there are no cloud conditions in Mercury


Does sodium hurt your body?

sodium is salt and salt does not hurt your body. You might get sick if you have alot.


What salt is produced with sodium carbonate and sulfuric acid?

I think it might be something like Sodium carbonide sulphate. sodium c. + sulphuric acid =Sodium carbonide sulphate.


What are object attributes called that helps them distinguish them from other variables you might use?

Fields


How do you describe mercury's atmosphere?

Mercury barely has an atmosphere at all. So little that it might as well have no atmosphere.


Does mercury have any natural resources?

Possibly...... it might!


In what applications might businesses find it useful to distinguish between a human and a computer?

repairing mechanicals


Why would we not expect magnetic fields on the moon or mercury?

You might, but that would be wrong! Mercury has a strong magnetic field.


What is the lowest melting point of any metal not mercury?

Caesium melts at 28.44oC, which is the lowest known melting point for any metallic element other than mercury. Certain radioactive elements might have lower melting points if it were possible to collect a large enough quantity of them to actually determine the melting point. For example, the melting point of francium is expected to be lower than that of caesium (but still higher than that of mercury). Also, some alloys melt at low temperatures. A eutectic alloy of sodium and potassium melts at around -12oC, still higher than mercury, but below caesium (and well below either sodium or potassium alone as well).


Why are substances important to distinguish?

Substances have different properties. If you mistook one for another, you might get an unpleasant surprise.