(Polar molecules, Non-polar molecules, etc.)
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According to the information I collected online, the first ionization energy of oxygen is 1313.94 kJ/mol and that of chlorine is 1251.19 kJ/mol. So the ionization energy of Cl is lower than that of oxygen, making Cl reasonable to be put as the central atom.
EMurphy_1L wrote:how do you know the central atom since it's not always that with lowest ionization energy?
For example, why is Cl the central atom in ClO2+ ?
To allow for stability in the molecule/compound, the central atom is the atom with the lower/lowest electronegativity. In this case, oxygen is more electronegative than chlorine.
Tiffany Dong_4e wrote:The central atom is typically determined by whichever atom has the lowest electronegativity. Aside from this, the atom which is alone or has the lowest quantity is usually in the center.
This is probably the best rule to follow! Try not to over complicate it because it may confuse you more.
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