Weegy: Elements filling d-orbitals are classified as transition metals. Elements in the table are in energyl levels 3, 4, 5, and 6. Theoretically, d-orbitals exist in energy levels 3 and greater. (s starts in 1 p starts in 2 d starts in 3 f starts in 4) [ ] User: Select the correct electron configuration for Vanadium Weegy: What is the the electron configuration of vanadium? ... The electron configuration for an element is the arrangement of electrons in the orbits (or shells) ... User: what is the electron configuration of vanadium? Weegy: [Ar] 3d3 4s2 User: Scientists have not yet determined exactly why electrons do not collapse into the nucleus. True False Weegy: Scientists have not yet determined exactly ... why electrons do not collapse into the nucleus ... Scientists know precisely why electrons do not collapse into ... User: true or false Weegy: False (they don't collapse because they orbit around nucleus on specific energy levels and they only emit energy when returning from aggravated state) (while they stay in their energy level they do not emit or absorb energy). source yahoo (More)