12 = 4 tops + 4 downs + 4 around
SF6, Sulfur hexafluorine: it is an S-centered octaedralform with 6 F at the 6 corners
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This seems like a misprint. IF6 will have one electron too many to attain an octahedral structure with 90 degree bond angles. SF6 is octahedral, for example, and does have 90 degree angles, as does PF6(-1). Perhaps IF6(+1) is the molecule in question, which will have the proper number of electrons.
Oh, dude, molecule x-y-x has a linear shape with bond angles of 180 degrees. It's like a straight line, you know? So, if you're ever in a geometry competition and they ask about x-y-x, just remember it's as straight as a ruler.
The bond angles are 120 degrees
Bond angle can be caused by internal angle between the orbitals having bonded pair of électrons, hybridization, presence of lone pair of electrons and electronegativity of the atom. and also Bond energy
The molecule of iodine heptafluoride has a bi-pyramidal pentagonal shape. All of the F-I-F angles between two fluorine atoms in axial and equatorial planes are equivalent to 90 degrees. Therefore there is five of them.