Is it possible to make a mead with just honey,water,yeast,and fruit of choice without any chem.would it work or would i just be wasting time and ingredients?
It is possible. But it might take a long time.
The additives that I think of when I make mead or melomel are campden tablets, pectin enzyme, yeast nutrient, some form of acid (citric, malic, tartaric, blends, etc), and stabilizers like sorbate and campden tablets again.
I don't know how many people use campden tablets to pre-sanitize their must, but alternatively you could heat pasteurize your must. I think bringing liquid to 165ish fahrenheit for a half minute or so should work. You could blanch any fruit you want to add and that might keep unwanted microbes at bay.
Pectin enzyme is good for getting your melomel to clarify. If you don't care about appearance, skip.
Yeast nutrients can be substituted, with varying degrees of success, with boiled bread yeast, maybe some raisins, or using fruit or fruit juice that is high in nutrients that yeast need but honey lacks. Or you could just let it ferment for a few years. Maybe make a pyment?
The pH should drop given time (I think?), or you could add fruit that is acidic, like rhubarb or maybe black currents (I wouldn't know about currents first hand). If you don't want to use powdered acids to drop the pH or add acidic fruits, I would suggest you stick with a dry mead.
You can skip the stabilizers, but make sure it is done fermenting before packaging, and maybe bottle into champagne bottles. I think stabilizers add to the shelf life of a wine/mead as besides preventing further fermentation, but I'm not completely sure how. I have been told they help prevent discoloration and even oxidation. I have skipped stabilizers and had no problems with the wine, but I didn't let it age for long.