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Dr. Lavelle said polarizability depends on the number of electrons and the size of an atom or molecule. I think he said polarizability decreases across a period and increases down a group. If I made a mistake, can someone point that out? Also, can someone explain what this means. I don't quite understand the relationship.
Polarizability has to do normally with anions while polarizing power has to do with cations. Normally, atoms that hold their electrons more loosely have higher polarizability, meaning their electron cloud will be easier distorted by a cation. When looking for polarizability, take account the size of the atom (larger size means higher polarizability since the electrons are not held as tightly to the positive nucleus) and look at the electronegativity (if the atom has a higher electronegativity they are going to hold onto their electrons more tightly). Hope this clarified it for you!
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