how can we know that which element has one bond or two bond or any type of bond??
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Answer:
Bond type is predicated on the difference in electronegativity of the two elements involved in the bond. The degree to which a given bond is ionic or covalent is determined by calculating the difference in electronegativity between the two atoms involved in the bond.When figuring out whether to place a double or triple bond you should always look at the number of valence electrons present as well as the number of bonds a central atom is likely to form. Another good way to know whether to use double or single bonds is to calculate the formal charge on each atom in the molecule.the highest and most center one will be the most ionic compound. It is important to rememebr that bonding is a spectrum. Compounds are not either ionic or covalent but most are something inbetween.∴ Among given choice C−S bond is most covalent in nature.