How to decide central atom?

Moderators: Chem_Mod, Chem_Admin

Nicholas Le 4H
Posts: 74
Joined: Fri Sep 28, 2018 12:24 am

How to decide central atom?

Postby Nicholas Le 4H » Fri Nov 02, 2018 4:57 pm

Is the central atom in the Lewis structures based off of which atom has the lowest electronegativity or which atom has the lowest ionization energy?

Jayde Felix 4H
Posts: 59
Joined: Fri Sep 28, 2018 12:28 am

Re: How to decide central atom?

Postby Jayde Felix 4H » Fri Nov 02, 2018 5:00 pm

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

Julia Go 2L
Posts: 60
Joined: Sun Sep 30, 2018 12:17 am
Been upvoted: 1 time

Re: How to decide central atom?

Postby Julia Go 2L » Fri Nov 02, 2018 5:03 pm

The trend for electronegativity and ionization energy is the same on the periodic table. So the element that is the central atom should have both the lowest ionization energy and be the least electronegative. Electronegativity and ionization energy increases as you go up and to the right.

Germar G 4F
Posts: 38
Joined: Fri Sep 28, 2018 12:28 am

Re: How to decide central atom?

Postby Germar G 4F » Fri Nov 02, 2018 5:06 pm

The central atom is always the one with the lowest ionization energy/electronegativity. An easier way to tell which is the central atom, however, is by seeing which atom we have the least of. For example, for CH4 C would be in the middle since there is only one C atom.

Nicole Garrido 2I
Posts: 52
Joined: Fri Sep 28, 2018 12:18 am

Re: How to decide central atom?

Postby Nicole Garrido 2I » Fri Nov 02, 2018 5:11 pm

The central atom is the atom with the lowest ionization energy, so the atom that requires the lowest amount of energy to remove an electron. The element closest to the bottom left of the periodic table.

Jack Hewitt 2H
Posts: 67
Joined: Fri Sep 28, 2018 12:27 am

Re: How to decide central atom?

Postby Jack Hewitt 2H » Fri Nov 02, 2018 7:33 pm

Nicholas Le 3A wrote:Is the central atom in the Lewis structures based off of which atom has the lowest electronegativity or which atom has the lowest ionization energy?


It is based off of lowest ionization energy.

Brandon Sanchez 3J
Posts: 30
Joined: Wed Oct 03, 2018 12:16 am

Re: How to decide central atom?

Postby Brandon Sanchez 3J » Sat Nov 03, 2018 2:02 am

The central atom should be based on the lowest ionization energy and electronegativity.


Return to “Lewis Structures”

Who is online

Users browsing this forum: No registered users and 2 guests