Is boron smooth or rough

Answer 1

Boron does not have a surface, at least not in the sense that you probably would know it. Boron is a chemical element. While chemical elements do have extensive physical properties (e.g. mass, volume), an atom of any chemical element is so small that the rules of physics as we know them do not adequately apply to/describe it. One could make a pun on quantum superposition and say that an atom of boron is both smooth and rough until you observe it, which is to say that, since matter has both wavelike and particle-like properties, until it is observed, it may or may not be 'smooth' or 'rough.'

Answer 2

Boron is a solid element that typically exists in the form of a powder or crystalline structure. The surface of boron would feel smooth to the touch.