Central Atom

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Melissa Villanueva1K
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Central Atom

Postby Melissa Villanueva1K » Tue Oct 30, 2018 8:52 pm

When writing out the lewis structure for CH3OH how do we determine which one is the central atom? And if there are more than one, how do we determine that? Thanks!

timothy_ho_4B
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Re: Central Atom

Postby timothy_ho_4B » Tue Oct 30, 2018 9:02 pm

For any molecules, the central atom is the atom with the lowest ionization energy, so in the case of CH3OH, C would have the lowest
ionization energy, thus being in the center of the molecule.

Elena Maneffa 1E
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Re: Central Atom

Postby Elena Maneffa 1E » Tue Oct 30, 2018 9:07 pm

H is never a central atom, so you know that for sure. You then look at the other two elements, C and O. C is the central atom because it has the lowest ionization energy. So connect C and O with a bond, and then put 3 H's on the C and one H on the O. Don't forget to add 2 lone pairs to O.

Xingzheng Sun 2K
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Re: Central Atom

Postby Xingzheng Sun 2K » Wed Oct 31, 2018 6:32 am

For the Lewis structure, we always choose the atom with the lowest ionization energy as the central atom. Therefore it is C in this case.

Zubair Ahmed 1L
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Re: Central Atom

Postby Zubair Ahmed 1L » Wed Oct 31, 2018 11:13 am

When dealing with Lewis structures, the atom with the lowest ionization energy would be used as the central atom. Hydrogen is never the central atom so it would be Carbon in this case.

isarose0
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Re: Central Atom

Postby isarose0 » Wed Oct 31, 2018 11:48 am

The central atom is the element with the lowest ionization energy.

Madeera_Mian_3B
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Re: Central Atom

Postby Madeera_Mian_3B » Wed Oct 31, 2018 6:29 pm

As most people said, to find the central atom is the lowest ionization energy. Carbon would be the central atom since Hydrogen is never the central atom.

Vicky Lu 1L
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Re: Central Atom

Postby Vicky Lu 1L » Wed Oct 31, 2018 10:49 pm

The central atom is normally determined by the element with the lowest ionization energy, in your case with the example, CH3OH, carbon. However, if its finding the Lewis structure for HOCO for example, then you would write it straight out like that (H-O-C-O) since it is written in that manner.

Jaifreen_Bhangu_3K
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Re: Central Atom

Postby Jaifreen_Bhangu_3K » Thu Nov 01, 2018 12:15 am

The atom with the lowest ionization energy is in the middle.

anishathomas
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Re: Central Atom

Postby anishathomas » Thu Nov 01, 2018 12:27 am

You look for which one of the elements have lower ionization energies. Also you can usually rule out hydrogen as it tends to never be in the middle. Ionization energy increases across and period and decreases as you go down a group

Chem_Mod
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Re: Central Atom

Postby Chem_Mod » Thu Nov 01, 2018 9:39 am

All good answers

Jennifer Guzman 4C
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Re: Central Atom

Postby Jennifer Guzman 4C » Thu Nov 01, 2018 3:10 pm

The least electronegative atom will be central. Hydrogen is never central.

Selina Bellin 2B
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Re: Central Atom

Postby Selina Bellin 2B » Thu Nov 01, 2018 3:12 pm

lowest ionization energy!

Katie_Duong_1D
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Re: Central Atom

Postby Katie_Duong_1D » Thu Nov 01, 2018 11:12 pm

The atom with the lowest ionization energy should be the central atom. Since C has the lowest ionization energy, it should be the central atom. Carbon is also tetravalent, so being the central atom makes it easier for carbon to get its four bonds.


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