Question

explanation for the existence of IF7 and for the non-existence of Cl F7.

Answer 1

the small size of chlorine atom is probably the reason for non existence of ClF7 . The stearic hindrance between the compound does not let the compound exist.

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Answer 2

Answer:

as the size of iodine is much more and the e- positivity is greater than that of chlorine , therefore it is able to withstand the 7 fluorine atoms but bot chlorine ...

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