4
The oxidation number of silicon (Si) in SiF4 is +4. This is because each fluorine atom in the compound has an oxidation number of -1, and since SiF4 is a neutral compound, the oxidation numbers must add up to zero.
4, as in SiF4.
The chemical formula silicon chloride is SiCl4.
Silicon Tetrafluoride has a tetrahedral molecular geometry. That means there are 4 F atoms around the central atom Si.
Tetraflouride is not a substance in its own right, it merely means that something has 4 fluorine atoms in a molecule. Such a formula will end in F4, but it must be preceded by something. Examples: Carbon tetrafluoride is CF4, silicon tetrafluoride is SiF4, and diboron tetrafluoride is B2F4.
SiF3 is a covalent compound. It is formed by the sharing of electrons between silicon and fluorine atoms, rather than the transfer of electrons typical of ionic bonds.
polar covalent - use the electronegativity difference
The number of formula units in a unit cell depends on the type of unit cell and the arrangement of atoms within the cell. For simple cubic, there is 1 formula unit; for body-centered cubic, there are 2 formula units; and for face-centered cubic, there are 4 formula units.
The correct formula for Molybdenum IV Chlorate is Mo(ClO3)4.
The chemical formula for stannic hypoiodite is Sn(IO)4.
Formula = Mn3N4
The chemical formula for plumbic nitrate is Pb(NO3)4.