why is green color seen in a flame when a metal is inserted?
931030
That should only happen with copper or copper salts.\nIt's the oxidation of the copper in the flame.\nAll elements burn differently, this is the basis of how a spectrometer works.
460409
Just guess what the colors would be for different compounds before you actually do the flame test for the hypothesis.  \nOr you could guess whether it is the cation (the positively charged metal ion) or the nonmetal anion that is responsible for the different colors.
977182
Who cares, all flames are hot.\n\n"The color and temperature of a flame are dependent on the type of fuel involved in the combustion."
429574
gas emitting visible light as a result of being heated
920954
The most common flames are glowing carbon (all your examples are carbon based fuels) and the gases in air, most notably oxygen. \n\nPretty much a 'normal' flame is yellowish (carbon glowing) and a bit of blue (oxygen glowing) on the bottom.\n\nThe oxygen supply determines the color changes more than anything. More oxygen would push the yellow toward white and the blue increases.\n\nGet an "A".
20224
The color of an object is the color of the light it reflects, not the light it absorbs (unless it emits its own light).  If it looks green, then it's green.
847442
Since there are no metallic ions like sodium or copper to produce intense visible light wavelength emissions, I would suspect that the flame would be colorless or the kind of yellow flame you see at natural gas flaring.  I've not done this experiment (it's pretty hazardous).
787695
The nitrate ion is a good oxidizer, meaning it is reduced and the other species it reacts with is oxidized. The flame test is color dependent on the oxidation state (or number of electrons) present in the metal you are analyzing. So I would imagine that if you were analyzing something like the copper (I) cation in the flame, the color would change due to the fact that the nitrate ion is causing another oxidized copper species to be produced, such as copper (II), which has a blue color. Hope this helps and let me know if you have any other questions!
837660
Silver is one of the most reflective elements.  It will reflect the heat back into the vessel instead of allowing it to escape.
1087032
try Vogel's "Qualitative Inorganic Analysis", I'm pretty sure it has all the answers 4 u.\n\ndont care editions, but for 7th ed, ISBN is 0582218667\n\n****\nokey then, from Vogels\n\n1) when heated, lead nitrate decomposes to white solid lead oxide (PbO), brown gas (NO2) and oxygen gas. Brown gas decolorizes when contact with water. \n\n2) ammonia odur. ammonium compounds are all volatile towards heat and decomposes to ammonia and an acid but quickly recombine if the acid, in this case, hydrochloric acid, is a strong acid.\n\n3) anhydrate copper sulphate is white, hydrate copper sulphate is blue. I have no idea which one you actually heated. If it's anhydrate, no change; if hydrate, blue ---> white.\n\n4) blue precipitate forms initally, but resolve upon excess reagent, clear blue soln results due to the formation of copper complex [blue precipitate: Cu(OH)2*CuSO4, complex: [Cu(NH3)4]^2+]\n\n5) brown precipitates froms [Cu(OH)2], no change with excess reagents.\n\n6) metal-gray stipe (magnesium stipe) gains a redish brown color due to formation of copper metal. Possible decolorization of the soln (depends on how much magnesium u actually put in)\n\n7) volatile reaction, solid metal solves,ignitable gas is formed. (if phenolphthalein is added to water initally, soln becomes pink)
479037
because all a flame is is particles of whatever is burning giving off energy in the form of electrmagnetic radiation, namely light. Different compounds and elements give off different wavelengths of light when heated hence the color of the flame.
797049
It's just one of the most active metals.  It has to do with it's valence.  It's even more reactive with water... it catches fire.  Its most stable form is as sodium chloride... table salt.  We put it on our food, but separately, sodium and chlorine are deadly poisons.  Chlorine is a green gas that's heavier than air and reacts with almost everything.  It turns water into hydrochloric acid, but turns sodium into sodium chloride.
602893
It looks like the combustion of hexene.\n\nYou might be talking about the chemical compound of glucose also if that's a typo in there.
454778
The element that gives emeralds their beautiful green color is the same element that turns corundum into red rubies - chromium.
733136
All elements when heated give off a signature in the light spectrum. For example if you heated a piece of pure iron until it glowed then put a prism in front  of the light, you would see the spectrum of light -- obvious stuff. However because it is the metal iron there would be slots-- frequencies that would be missing. These signatures are all very different from each other depending on which element(s) are giving off light. When something is red shifted the signature is still there but it's place in the spectrum is in the wrong place. It has shifted to the red end of the spectrum-- it is in the longer or red end of it.\n\nThere is two ways to think of this, the other is that when heated elements will give off light in only so many frequencies- the rest of the frequencies are missing.
81060
Almost all of them actually. The rusting of iron forms a red colour,  the burning of a match forms a black color and so forth. Think of any chemical reaction and it will most likely include a colour change.
942282
If I remember correctly, it gives off a yellowish violet color when heated in a flame.