It's probably obvious but I can't find the exact answer anywhere. All help appreciated.
2007-10-04 05:38:09 · 2 answers · asked by Ethereal 4 in Science & Mathematics ➔ Chemistry
measurement of covalent radii is obtained from molecules.
e.g. O=O, the radius is 1/2 of the distance between two nuclei, you can measure the distance between two oxygen nuclei, H-H, you split 2 hydrogen atoms at the middle, you get the radius for hydrogen. electrons are moving around, without the help of nucleus, it is not accurate. you don't have He-He or Ne-Ne. noble gas don't usually form molecules or compounds, but you can probably find those that do. Kr and Xe form compound with fluorine, so they have measured radii as well as electronegativity.
2007-10-04 05:45:06 · answer #1 · answered by Carborane 6 · 2⤊ 0⤋
They do not form stable molecules.
2007-10-04 05:50:24 · answer #2 · answered by ag_iitkgp 7 · 1⤊ 3⤋