Assertion: white phosphorus | /r/HasProperty | exposed to air
Facets:
Source sentences:
text: When exposed to air, white phosphorus will begin to burn, and the element also glows in the dark.
text: 155mm artillery projectiles containing 116 felt wedges impregnated with white phosphorus , which ignites and continues to burn when exposed to the air.
text: White phosphorus is relatively transparent white, but gets a yellow tinge to it when exposed to air, where the surface oxidises which changes the optical properties (it also glows in the dark as a result of the oxidation).