| Thanks. I got it. And just a quick note: for the "explanation" bit: Bbcause the electrons in the Zn and Cu atoms absorb UV / IR, so their electron configuration in the outermost shell are changed, thus they change colour.
E.g.: Zn is white when cold, because its outermost shell is filled. But it is yellow when hot - indicating that the 3d subshell is not fully occupied. |