Sodium vapour.
I think it's sodium.
Sodium (chem symbol = Na) Mercury vapor is also used in street lights. Low pressure sodium vapor street lights are amber/yellow in color, high pressure sodium lights are white and mercury vapor lights glow blueish white.
No, the light producing quartz arc tube is totally enclosed in a borosilicate glass envelope which contains nitrogen gas. This is a completely sealed unit so no vapours are released.
yes
Yes many people believe that metal halide street lights are environment friendly. Here are some sites about these lights. www.fairfaxcounty.gov news releases 2009 , enduraliteled.ca/municipal
Depends on the color: yellow-orange is surely sodium light, bright blueish can be xenon, krypton or mercury light. The color of LED-light is differently 'made'.
Boiling point: the temperature when vapours of the material are formed.
Yes you can get more information on line about metal halide lights at the following sites. Here are some sites you can look at www.eskimo.com/~jrterry/lampspage.html
Mercury. The metal gives off poisonous vapours - and has largely been replaced by alcohol.
Try heating the super glue with a propane torch. Keep away from the vapours.
there is no yellow pure metal
Gold