atom 4d portal pendaftaran ujian e-learning smk negeri 1 banjarbaru ATOM 4D. Quantity: Add To Cart. Copyright ©2025 ATOM 4D All Rights Reserved. ATOM 4D.. 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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