HI,everyone.I have a problem. the angular portion of wavefunction of hydrogen,like 3d. n=3,l=2,so m=2,1,0,-1,-2.I read some books that say dxy,dxz,dyz,dz2,dx2-y2,so what the corresponding Relation between them. for example,dz2 corresponding what ?m=0?? and why? any help will be highly appreciated!!!