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Everyone is getting 1.34pm, 1.35pm and 1.36pm for atomic radius of iridium. Are those answers correct?...

Everyone is getting 1.34pm, 1.35pm and 1.36pm for atomic radius of iridium. Are those answers correct? Why are they finding anohter answer with same method? Also when I looked at wikipedia, it says 200pm as well. I just want to know If all answers correct or not. Morever, they're finding anohter answer by using same method. I don't know what to believe in answer right now.

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Answer #1

200 pm there is the Vander Waals radius of iridium. For a neutral Atom, the radius varies depending upon the way in which the measurement is made. For example, we have atomic radius, Covalent radius, molecular single bond covalent radius, molecular double bond radius and so on. Finding different answers using the same method may be due to experimental errors. You have not discussed the method here. So kindly analyse the method for possible sources of error.

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