Three compounds that contain an element from Group 18 are XEOF, XeO,F2, and XeF4. Possible Lewis electron dot diagrams for the compounds are shown below. :ö: :0: :F: :0: || :F :0: || E-Xe-F: :O: :0: :ö: A D E (c) Which structure, B, C, or D, minimizes the formal charges for each atom in XeO,F2 ? Justify your choice

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Actinides

The elements in which the extra electron tends to enter the 5f-orbitals of (n–2)th main shell are considered 5f-block elements. They are also named actinides. Actinides include 15 elements, from atomic number 89 to 103.