i would just simply say that ist the first inversion of a power"chord" - stricktly speaking neither of both is a chord because the definition of a chord is a structure of 3 notes stacked on top of eachother. however.. a powerchord is neither diminished, nore augmented, nore major or minor - its only a root and a fifth. to make it minor or major for example, you have to add the relative third - but thats basic theory and should be clear.