Answer: heat because we get light and their are chemicals in heat
pH is a scale or measure by which an aqueous solution could be determined of its acidity or basicity.
According to sources, the most probable answer to this query is that pH changes when for instance, an acid solution is introduced to a base solution.
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That's not a question, but I guess I'll just vomit some information at you and hope I hit a target.
First of all, not true. Unless you're talking multiple choice kind of thing.
Room temperature is 20 degrees C / 68 degrees F / 293 degrees K
At this temperature, most elements are solids, but
Mercury and bromine are liquids
Hydrogen, helium, nitrogen, oxygen, flourine, neon, chlorine, argon, krypton, xenon, and radon are all gases.