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Nikki Razal 1L
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Postby Nikki Razal 1L » Sun Oct 27, 2019 9:02 pm

If electronegativity increases from left to right and bottom to top of the periodic table, why is fluorine the most electronegative element?

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Re: Electronegativity

Postby emaad_3H » Sun Oct 27, 2019 9:09 pm

Fluorine is the most electronegative because if you went further to the right or higher up, you'd reach noble gases. Electronegativity is a measure of a tendency for an atom to attract an electron. Noble gases already have a full octet or in the case of helium 2 electrons and do not need any more electrons so they will not attract anymore.

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Re: Electronegativity

Postby AndreiRekesh1I » Sun Oct 27, 2019 9:10 pm

You can think of electronegativity as how "hungry" an atom is for electrons, usually because it wants to complete its outer valence shell. Since the furthest right elements of the periodic table are the noble gases, which are stable and already have completed valence shells, they aren't very electronegative at all, compared to flourine, which is extremely electronegative because it has seven out of eight valence electrons in its outer shell and only needs one more to complete it.

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Re: Electronegativity

Postby DesireBrown1J » Sun Oct 27, 2019 9:10 pm

Flourine has the highest electronegativity because noble gases have no electronegativity. They already have a full outer shell, so they will not gain nor lose an electron.

Robert Cross 1A
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Re: Electronegativity

Postby Robert Cross 1A » Sun Oct 27, 2019 9:11 pm

I think it's the highest electronegativity because it is at the top right of the periodic table. Halogen's are known for being very reactive because of their valence shell being one electron away from a full octet. Although Neon is further right on the table, it is a noble gas, which are nonreactive, so electronegativity doesn't really apply to them.

Jonathan Gong 2H
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Re: Electronegativity

Postby Jonathan Gong 2H » Sun Oct 27, 2019 9:12 pm

Fluorine is the most electronegative element because it has 5 electrons in its 2p shell. Since fluorine is close to the ideal electron configuration of 6 electrons in its p shell and given that it has a relatively small atomic radius paired with its nuclear charge, fluorine is the most electronegative. Also, since its the top of the halogen group it is extremely reactive. Hopefully this helps.

Charysa Santos 4G
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Re: Electronegativity

Postby Charysa Santos 4G » Sun Oct 27, 2019 9:16 pm

Fluorine is the most electronegative element because it almost has a full valence shell, and since its atomic radius is relatively smaller than the other elements in its column/group, the positively-charged nucleus has a higher chance of attracting the last negatively charged electron to fill this shell.

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