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Which element at center of the structure

Posted: Sun Nov 03, 2019 8:00 pm
by 405398682
How do I know which element is the center besides Carbon?

Re: Which element at center of the structure

Posted: Sun Nov 03, 2019 8:01 pm
by KarineKim2L
I believe the least electronegative element goes in the middle.

Re: Which element at center of the structure

Posted: Sun Nov 03, 2019 8:02 pm
by katrinawong3d
The most electronegative element goes in the middle.

Re: Which element at center of the structure

Posted: Sun Nov 03, 2019 8:04 pm
by Alison Trinh 1E
The element with the lowest ionization energy or the element with the least electronegativity is the central atom.

Re: Which element at center of the structure

Posted: Sun Nov 03, 2019 8:06 pm
by 504939134
The element with the lowest ionization energy will always be in the middle, but hydrogen will never be in the middle. Just look at your periodic table and remember that the ionization energy increases as you go across the periodic table (left to right)

Re: Which element at center of the structure

Posted: Sun Nov 03, 2019 8:12 pm
by Sean Tran 2K
The least electronegative atom is placed in the center of the electron structures, with the exception of Hydrogen, which will never be in the center.

Re: Which element at center of the structure

Posted: Sun Nov 03, 2019 8:14 pm
by Julie_Reyes1B
Hi!
There are two main factors that can help you guess which element is in the center of a structure.
a. Symmetry- Most compounds tend to be as symmetrical as possible. For a compound such as CH4, C would be the central atom rather than any of the four H atoms.
b. Electronegativity- The element with the least electronegativity tends to be in the center. Electronegativity is basically of an atom's ability to pull in electrons. Central atoms usually have to share most of their electrons, while peripheral atoms can hold on to their electrons more tightly as lone pairs. Thus, highly electronegative elements are usually not the central atoms.
Hope this helps!