Sulphur (USA Spelling Sulfur) does not have a high level reaction to normal air or oxygen and will not combust on contact with either element. Normally Sulphur (Sulfur) deposits are found naturally in areas around hot springs and in the majority of volcanic regions.
It is also found in nature as iron pyrites (iron sulfide), galena (lead sulfide), gypsum (calcium sulfate), Epsom salts (magnesium sulfate which is used for stomach upsets).
Sulphur (Sulfur) is often recovered for commercial use from underground deposits using the Frasch Process which is basically superheated water and steam pumped underground, where they melt the sulphur (sulfur), is then pumped to the surface.
Sulphur (Sulfur) is also obtained commercially as a by-product of refining crude oil which is why if you pass a refinery you smell that wonderful aroma of rotten eggs.
Yes, sulfur can burn in air forming sulfur dioxide.
yes it will catch fire if air is too hot.
Since air is not inherently flammable, there is no speed at which a helicopter blade would catch the air on fire.
Sulphur
yes, if the wood is dry and the air is hot enough
By using toliet paper and match sticks with fire
Phosphorus (especially white phosphorus) is a nonmetal that can spontaneously catch fire (VERY reactively) in air.
because it is fat
Burning elemental sulfur in air will create sulfur dioxide.
Sulfur dioxide in air = 1 ppm
When it gets hot enough it will catch fire and burn violently.
if you take away its stable oxcide film it will react to air and catch on fire