How many of the following factors influence the electro negativity of the atom of an element?
i) Effective nuclear charge
ii) Screening effect of inner electrons 
iii) Size of the atom
iv) oxidation state of the atom in bond 
v) Type of hybridization of the atom
vi) Strength of bond in which it is participated 
vii) Number of surrounding atoms on the other atom with which it is bonded
viii) Nature of bond