What's the combustibility for strontium?
398076
if the powder size is quite small, eg grains to dust, it can spontaniously explode in air.  Otherwise it just "rusts" to get a layer of oxide like most metals.
642168
Oxygen 42.6%\nMagnesium 20.8%\nSilicon 20.5%\nIron 9.9%\nCalcium 2.31%\nAluminium 2.04%\nNickel 0.472%\nChromium 0.314%\nManganese 0.131%\nTitanium 0.122%
237935
francium. mercury is technicaly not a metal, it just has a low melting point, low metling points do not make it unstable. if that were the case, then oxygen would be VERY unstable ITS ALREADY TURNED INTO VAPOR!!!
871634
stndrd enthalpy of formation for NaF (s) is -569.0 kJ/mol\n\nhttp://chemistry.about.com/library/weekly/blheatform.htm
743618
Commercially a safety fuse of gunpowder is used to ignite the mixture.\n\nUsing magnesium is an unreliable and perhaps a dangerous way of igniting thermite. This is because the igniting would usually be done through a small hole. This does not give the Mg enough oxygen to burn. It is dangerous because the heat generated by burning one end of the magnesium may propagate to the unburnt end due to the high heat conductivitity. This may cause premature ignition of the thermite.\n\nWell, in using Mg you may increase the contact area to air around the contact point around the Mg and the thermite.\n\nAlternatively, you could use a conventional sparkler to ignite the mixture.
925364
Definitely not water, as those three metals will burn on contact with water (and potassium will explode.) Liquid CO2 might do, as it would cool the burning material extensively, possibly below the ignition point. The sand (SiO2) would be a smothering agent. I'm not sure about the carbon tet.\n\n5 NOV 06, 1522 hrs, GMT.
949133
OMG!\ni have the same question!\nmine is:\nA piece of an unknown metal has a mass of 20.0 g and at 100.0 C is placed in a styrofoam cup calorimeter containing 50.7 g of water at 22 C. If the final temp is 27.2 C, calculate the specific heat capacity of the metal. Assume that all the energy lost by the metal is gained by the water.\n\nok, haha fine, not the SAME question, but close enough. But, i'm uber confused. ><
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).
232646
Fire is oxidation of a material at a fast rate. The aluminum foil you put in the stove getx a coat of aluminum oxide on it and then goes no further as a gas oven is not hot enough to "burn" aluminum. Aluminum can be burned if one gets the temperature hot enough. This is called the thermite reaction and happens when finely divided aluminum, such as shavings is mixed with iron oxide (rust) and the mixture set afire with a fuse perhaps made from thin strips of magnesium metal. The iron oxide or rust becomes iron metal again and the aluminum becomes aluminum oxide or alumina. The heat is intense enough to melt iron.Such reactions are used in industry to perform welding. It is all quite dangerous and a person not familiar with the laws of chemistry may become blinded by the light of the reactions involved or harmed by server burns. Do not try this at home.
488199
Potassium is SO flammable, that if it is dropped in WATER it will rip the oxygen away from the hydrogen and burst into flames! \n\nThat is why it is kept in oil or kerosene, to avoid the possibility that it will come into contact with any moisture. Lithium and sodium will also burn with water this way. Magnesium will spontaneously burn with steam, not liquid water.
860447
There's no separation of molecular oxygen to atomic oxygen as previously written:\nsimply \nOx: Sr -> Sr2+ + 2e \nRed: O2 + 4e -> 2 O2-
557678
Ah ha.  Thermite.  Magnesium ribbon would be the usual method to start this reaction.\n\nBe careful with this reaction...
1132513
Nothing is indestructable, everything burns or melts at a certain temperature. even aerogel, the most fire resistant synthetic material, has a melting point of about 2000 degrees farenheit. This website should help clear it up, \n\nhttp://en.wikipedia.org/wiki/Black_Box_%28transportation%29\n\nbut basically it is a quarter of an inch thick steel with fireproof material like kevlar underneath. it is a flight data recorder and voice recorder that can store flight data to tell what went wrong and voice recorder to tell if it was a terrorist attack/highjack or determine if it was a human error. old ones used to have moving parts and failed occasianally, but newer digital ones have no moving parts, hold more information, and never fail that i have heard about.
1092780
From a "Dangerous Goods" standpoint :\n\nFlammable materials have a flash point below 61°C. So, most common solvents (Stoddard solvent, kerosine, petrol, VM&P Naptha) and organic liquids and gases (acetone, ether, nitromethane, methane, ethane, propane, butane, ... up to about nonane) are flammable. Some solids (eg naphthalene) are also flammable.\n\nCombustible materials have a flash point greater than 61°C. So diesel fuel, paper, coal, wood, etc are all combustible.\n\nAlso, don't get confused between explosivity and flammability - many explosives aren't flammable. C4 is an example - it will burn (combust) but requires percussive detonation to make it explode. So here's a tip - don't try to "stamp out" burning C4!\n\nAlso, explosivity may be limited to a certain range of concentrations (expressed as Lower Explosive Limit - LEL and Upper Explosive Limit - UEL). These are usually expressed as the % w/v of the fuel in air, although it is sometimes expressed in relation to the oxygen content.
736694
4Cr + 3O2 --> 2Cr2O3\nChromium(III) oxide or Chromium oxide.
276169
I'd say the left-most column, the alkali metals. All of them, in the metallic state, explode in contact with water. This is why they must be stored in oil, so they don't come in contact with the water vapor in the air.
813427
The size of the metal would be dependant on many factors such as plane design and location of the explosion to name a few.\n\nthe problem with elemental rare earth metals is they are very reactive with water, making handling them in such a manner virtually impossible.\n\nAs far as the realative reactivity, the ammount of energy released can be calculated from the Gibbs free energy for each reaction.\n\nFor the reaction of sodium with water at room tempreture\n\nSodium with enough water would release 9260 KJ per pound of sodium while Potassium would release 2350 KJ per pound.\n\nI would suspect that at least 10 pounds of sodium to do any significant damage to a plane and 50 pounds of potassium.\n\nThis is a very unreasonable amount, although the cost would be less than 1000 dollars for this ammount of sodium, there are very few places that a large quantity could be obtained.\n\nAdditionally, sodium is so reactive, that I do not think that anyone could ever get it onto a plane before it blew. Lastly, that large of an ammount of sodium would fill a carry on bag, and would never get thru even the worst of TSA screeners.