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Worksheet 4: Shells, Subshells, and Orbitals Before starting this worksheet, define the following terms in your own words: shell, subshell, orbital, orbital diagram, and electron configuration. Make sure all group members understand before moving on 1. Sketch a Is orbital, a 2x orbital, and a p orbital on Xandy-axes, How many total electrons can each of these orbitals hold? 2. What groups on the periodic table are in the x-block, p-block, d-block, and f-block? 3. How many sublevels, orbitals and electrons could be found in each of the following energy levels: 4. Complete the below orbital diagram for Mg (magnesium). Then use the diagram to write the full electron configuration. Identify the valence electrons in your configuration and write a Lewis Symbol for Mg, " 11 nucleus 5. Use what you have learned about orbitals and electrons to describe why an atom of magnesium is smaller than an atom of calcium, which is smaller than strontium, and so on down group 2. It may help to draw the orbital diagram above for the first two elements