Sublevels and the shapes of s and p orbitals

What is the correct electron configuration of the selenium atom? A. $1s^2 2s^2 2p^6 3s^2 3p^6 3d^{10} 4s^2 4p^4$ B. $1s^2 2s^2 2p^6 2d^{10} 3s^2 3p^6 4s^2 4p^4$ C. $1s^2 2s^2 2p^6 3s^2 3p^6 3d^{10} 4s^2 4p^6$ D. $1s^2 2s^2 2p^6 3s^2 3p^6 3d^{8} 4s^2 4p^6$

Three orbital shapes, labelled I, II and III, are drawn below. Which row correctly identifies the shapes of a 2s orbital and a 2p orbital? A. 2s: II, 2p: I B. 2s: I, 2p: III C. 2s: I, 2p: II D. 2s: III, 2p: II

(i) The boxes for the 1s and 2s orbitals of a sulfur atom are shown below. Draw the remaining orbitals needed for its ground-state electron configuration, filling and labelling each one. Use section 7 of the data booklet. (ii) For a sulfur atom, sketch the…