atom 4d Atom Araullo. 588848 likes · 683 talking about this. Appears on TV occasionally. UNHCR Philippines Goodwill Ambassador. FYT Media co-founder.. 4d atomic orbitals. There are five 4d orbitals. These are labelled 4dxy, 4dxz, 4dyz, 4dx 2-y 2 and 4dz 2. The 4dz 2 name is an abbreviation for 3d(3z 2–r 2).
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