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Question: Which element has a larger radius?

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hifer:
The answer lies in the fact that for elements other than the noble gases, you are measuring metallic or covalent radius, which is measured when they form metallic or covalent bonds. For nobles gases, we measure their van der Waals(Dispersion forces) radius, where they are bonded less tightly and closely to each other.

To explain this simply, when non-group 8 elements form metallic or covalent bonds, their electron "cloud" gets squashed, and since the atomic radius measures the distance from the nucleus to the center electrons that participate in the bonding, they are smaller than the noble gases in their period.

joechan521:

--- Quote from: "hifer" ---The answer lies in the fact that for elements other than the noble gases, you are measuring metallic or covalent radius, which is measured when they form metallic or covalent bonds. For nobles gases, we measure their van der Waals(Dispersion forces) radius, where they are bonded less tightly and closely to each other.

To explain this simply, when non-group 8 elements form metallic or covalent bonds, their electron "cloud" gets squashed, and since the atomic radius measures the distance from the nucleus to the center electrons that participate in the bonding, they are smaller than the noble gases in their period.
--- End quote ---


i agree, top answer

hifer:

--- Quote from: "joechan521" ---
--- Quote from: "hifer" ---The answer lies in the fact that for elements other than the noble gases, you are measuring metallic or covalent radius, which is measured when they form metallic or covalent bonds. For nobles gases, we measure their van der Waals(Dispersion forces) radius, where they are bonded less tightly and closely to each other.

To explain this simply, when non-group 8 elements form metallic or covalent bonds, their electron "cloud" gets squashed, and since the atomic radius measures the distance from the nucleus to the center electrons that participate in the bonding, they are smaller than the noble gases in their period.
--- End quote ---


i agree, top answer
--- End quote ---


wahaha.. joe u dun even do chem :p lol

Collin Li:
I maintain that this isn't on the course.

hifer:
Yup, agreed it's not on the course.

But i just found this question pretty intriguing and posted the answer for anyone that's actually interested :D afterall, it's not all about getting the marks is it? haha..  :lol:

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