A compound composed of sulfur and fluorine has an empirical formula of SF. The structure of this compound has a formal charge of zero on all elements in the compound. Draw the Lewis structure for this substance. (Assign lone pairs and radical electrons where appropriate.)

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Q: IDENTIFY the following types of cheimcal reaction: S + O2 = SO2

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Q: 8. How would you prepare a solution with a concentration of 0.005 M of Na₂SO4 from a stock solution…

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Q: 16. 18A HO F F OH A and B are the same molecules A and B are different molecules

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Q: isotope symbol for sodium isotope with 12 neutrons 

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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.