Why is fluorine more electronegative than helium?
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Because fluorine only lacks an electron for the noble gas configuration (which wants to have it). As a noble gas, Helium already has a noble gas configuration, so it no longer needs an electron.
Because the electronegativity is determined by the respective nuclear charge and the atomic radius.
m.f.G.
present
This depends on the scale you use. The electronegativity must first be defined and then calculated. After the Allred-Rochow scale (one of the many), Helium has the highest electronegativity. If we use binding energies like Pauling, we have the problem that helium does not have any common chemical compounds. Thus, no meaningful electronegativity for helium can be calculated in the system.
Electronegativity tends to increase with increasing order number in the periodic system.
On the Pauling scale, fluorine has a value of 3.98 – helium, on the other hand, almost zero.