3D model of a Silicon Tetrafluoride molecule (SiF4) with chemical formulas and electron shell diagrams on a blue background.

Silicon Tetrafluoride (SiF₄): Chemical Formula: SiF₄ Silicon has 4 valence electrons (group 14, atomic number 14). Fluorine has 7 valence electrons (group 17, atomic number 9). Lewis Diagram and Structural Formula: Silicon shares one electron with each of the four fluorine atoms, forming four covalent bonds (each bond is a pair of shared electrons). The Venn diagram or addition process sums up valence electrons: Si (4 valence e⁻) + 4×F (7 valence e⁻) = 4 + 28 = 32 electrons total to distribute. Bond Order: Bond order in SiF₄ is 1 for each Si-F bond (single bonds). This means one shared electron pair per bond. Why is it covalent? Because it is between a metalloid (silicon) and non-metal (fluorine), and electrons are shared, not transferred—typical of covalent bonding. Summary of key corrections: For CaCl₂, clearly indicate it forms ionic bonds due to electron transfer. For SiF₄, the bond order is 1 (single bonds) based on sharing one electron pair per bond. The covalent nature is due to sharing electrons between nonmetal/metalloid atoms. Feel free to ask if you want me to help with writing the Lewis dot structures or diagrams! Ver más