Periodic Trend

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Jarrett Peyrefitte 2K
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Periodic Trend

Postby Jarrett Peyrefitte 2K » Fri Nov 08, 2019 3:47 pm

What is the periodic trend for electronegativity? Can someone explain why it is the way it is conceptually?

Shannon Asay 1C
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Re: Periodic Trend

Postby Shannon Asay 1C » Fri Nov 08, 2019 4:00 pm

Electronegativity increases up a group and across a period, going towards Fluorine, which is the most electronegative element. Electronegativity refers to an atom's ability to attract electrons, and since Fluorine only needs one more electron to complete its valence shell and have a full stable octet, it has a high electronegativity.

Maia_Jackson_2C
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Re: Periodic Trend

Postby Maia_Jackson_2C » Fri Nov 08, 2019 4:57 pm

You can also use effective nuclear charge to describe the electronegativity trend, because it also increases in the top right corner of the periodic table. This means that atoms hold their electrons more tightly because the elements with more electrons and smaller radius have more protons, so there is a stronger positive charge pulling in the electrons to the center.

Sjeffrey_1C
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Re: Periodic Trend

Postby Sjeffrey_1C » Fri Nov 08, 2019 5:00 pm

Additionally, these are basically the same trends as electron affinity and ionization energy. (Although ionization energy does dip for oxygen)

Nick Fiorentino 1E
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Re: Periodic Trend

Postby Nick Fiorentino 1E » Sat Nov 09, 2019 6:06 pm

Electronegativity increases up a column and left to right across a period. The noble gasses are exceptions because they have a full octet so they are not trying to take any electrons. One way to think of electronegativity is how bad an atom wants an electron.

Nare Nazaryan 1F
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Re: Periodic Trend

Postby Nare Nazaryan 1F » Sat Nov 09, 2019 9:09 pm

Electronegativity increases as you go across a period and up a group, with flourine being the most electronegative atom (same trend as ionization energy and electron affinity).

WYacob_2C
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Re: Periodic Trend

Postby WYacob_2C » Sat Nov 09, 2019 9:52 pm

Electronegativity is the ability to pull in an electron. It increases across a period because the nuclear charge of atoms increase, meaning its ability to pull in an electron is greater. It increases up a group also because the nuclear charge of atoms increase.

JChen_2I
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Re: Periodic Trend

Postby JChen_2I » Sat Nov 09, 2019 10:35 pm

Electronegativity increases to the right and going up. Electronegativity is the electron-pulling power of an atom. So as you go to the right on the table, the outer electron shell becomes increasingly full so the atom would want an electron more because it's closer to becoming stable with a full electron shell. It also decreases as you go down the periodic table because more shells means the valence electrons are further away from the nucleus so the pull of the nucleus isn't as strong.

Amanda Mei 1B
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Re: Periodic Trend

Postby Amanda Mei 1B » Sat Nov 09, 2019 11:33 pm

Electronegativity refers to how strongly an atom attracts bonding electrons to itself. Higher electronegativity means an atom is more likely to attract electrons. EN increases from left to right because more protons means there is a stronger attracted between the positively charged nucleus and negatively charged electrons. EN increases from bottom to up because the fewer valence shells there are, the closer valence electrons are to the nucleus.

Merin Padayatty 3G
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Re: Periodic Trend

Postby Merin Padayatty 3G » Sun Nov 10, 2019 2:10 pm

Electronegativity increases up the group and across a period.

Megan Ngai- 3B
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Re: Periodic Trend

Postby Megan Ngai- 3B » Sun Nov 10, 2019 3:30 pm

Electronegativity increases up groups then across periods.

Kendra Barreras 3E
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Re: Periodic Trend

Postby Kendra Barreras 3E » Sun Nov 10, 2019 9:36 pm

In general, for electronegativity just remember that Fluorine is the most electronegative and from there it decreases down and to the left from there.

Chanel D_4E
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Re: Periodic Trend

Postby Chanel D_4E » Sun Nov 10, 2019 9:45 pm

Electronegativity increases up a period and across a period from left to right!

Donavin Collins 1F
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Re: Periodic Trend

Postby Donavin Collins 1F » Sun Nov 10, 2019 9:55 pm

The electronegativity increases as it goes up the groups and across the periods.


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