What is Lewis structure: Definition and 47 Discussions
Lewis structures, also known as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures (LEDS), are diagrams that show the bonding between atoms of a molecule, as well as the lone pairs of electrons that may exist in the molecule. A Lewis structure can be drawn for any covalently bonded molecule, as well as coordination compounds. The Lewis structure was named after Gilbert N. Lewis, who introduced it in his 1916 article The Atom and the Molecule. Lewis structures extend the concept of the electron dot diagram by adding lines between atoms to represent shared pairs in a chemical bond.
Lewis structures show each atom and its position in the structure of the molecule using its chemical symbol. Lines are drawn between atoms that are bonded to one another (pairs of dots can be used instead of lines). Excess electrons that form lone pairs are represented as pairs of dots, and are placed next to the atoms.
Although main group elements of the second period and beyond usually react by gaining, losing, or sharing electrons until they have achieved a valence shell electron configuration with a full octet of (8) electrons, hydrogen (H) can only form bonds which share just two electrons.
The two rules are Methods 1 and 3 in https://sciencing.com/how-to-name-covalent-compounds-13712167.html
Given that the electronegativities of C, Si, N, P, S, O are approx. 2.5, 1.8, 3.0, 2.1, 2.5, , 3.5, resp., one of these rules has to give.
Thanks.
So I know about the 6 stable resonance Lewis Dot diagrams for sulfate:
As well as the unstable diagram that only has single bonds between the sulfur and oxygen atoms.But, is it possible for there to be other resonant structures with either 1 or 3 double bonds, even if they're more unstable? I...
The first thing we notice is that we have a metal and a nonmetal, so we would think about an ionic model.
These elements form the ions ##Al^{3+}## and ##S^{2-}##.
These ions form a lattice structure and we get an ionic crystal.
But apparently no bond is perfectly ionic or covalent.
The...
I've seen both types of diagrams when drawing covalent dot and cross diagrams. And some students that I teach said that the electrons should be on the circles.
But I do know that this is actually showing the electron overlap and electron field and in reality electrons are not in circular orbits...
ion shown:
My answer:
the following is the answer of the question:
I identified the major contributor correctly, but the resonance structures, but the second resonance I drew is missing in the answer sheet.
Can anyone tell me why the second resonance structure is not part of the answer...
I was told that there are six resonance structures for SO42-, as shown below.
I am wondering why this structure with single bonds is not one of the possible resonance.
I understand that it is unfavorable as the formal charges are spread out over all four atoms, but shouldn't is still be a...
Why do we have to memorize the structures of all the nitrogen oxides? Isn't there any way to understand about the Lewis structures of all the nitrogen oxides and their weird ways of making bonds?
Homework Statement
Draw the Lewis structure and structural formula for:
a) HCN
b) SO3 2-
Homework Equations
none
The Attempt at a Solution
Did I do these correctly? Thanks!
Homework Statement
:
2 Questions, sorry about this if It adds confusion.
1) How do I go about drawing Lewis Structure Diagrams? I've searched the web, but all I can find, even when they say it's a "Lewis structure" diagram is lewis dot diagrams. My teacher wants it in the specific form where...
Homework Statement
http://i.imgur.com/Jt3u2uo.png
Homework Equations
octet structure
bond strength
bond order
The Attempt at a Solution
I have no idea why the answer is b... after reading the book...
thank you.
Hi,
For school, I have to give the Lewis structure of C3H5+ ion.
There is a method explained, which is fairly easy, and has always worked. It has also worked for ions. However, this is the first time I have to give the Lewis structure of a positive ion.The valence of the C atom is 4 electrons...
So I keep getting this problem wrong and I don't know what's wrong. The structure I came up with is attached. If anyone can help I'd really appreciate it!
Homework Statement
How can I find oxidation number of N in N2O using lewis dot structure?
Homework Equations
None
The Attempt at a Solution
Is the structure of N2O like this:
Hi
I have a few questions that I have been working on but I don't get the right answer.
After drawing the Lewis dot structure of HOClO2, pick the incorrect statement of the following.
A. The oxygen bonded to the hydrogen has two lone pairs
B. the oxygens not bonded to hydrogen have three lone...
Homework Statement
I need to draw NH4NO2 which is an ionic compound.
3. The Attempt at a Solution
NH4 is fairly straightforward to draw, with one N in the middle and four H surrounding, and no lone pairs. The problem comes with NO2- which is one nitrogen bonded to two oxygens. However, one...
Hi,
I drew the lewis structure of SO2. The one with 0 formal charges gives me two double bonds. But, I see on the web that one single bond and another double bond is an acceptable resonance structure. What do they mean? Sulfur can expand its octet. Having 0 formal charge is much more...
Homework Statement
Draw the best LS for N2O5, which studies show
a) has a N-O-N central atom skeleton
and
b) Has a central atom bond angle of 180 degrees.
Comment on the unexpected bond angle of 180 degrees around the central atom.
Homework Equations
There are 40 valence electrons...
Homework Statement
http://i.minus.com/jxoYt94CAd9LY.png
Homework Equations
The total number of valence electrons in SOCl2 is 6 + 6 + 7(2) or 26 valence electrons. Dividing by 8, this implies a total of three bonds formed with the central atom (the least electronegative atom, or...
Homework Statement
Draw the best Lewis Dot Structures the following species:
ClF4+Homework Equations
none
The Attempt at a Solution
I calculated that there should be a total of 34 e- in the Lewis structure":
7 (1 chlorine atom) + 28 ( 7 from each of the four fluorine atoms) - 1(b/c the atom...
Many times, I find it hard to draw correct Lewis structure of molecules with nitrogen. For instance: the Lewis structure of H2CNN. I thought it should be double bond between C and N and single bond between N and N, like this:
But actually it's not. I have done many problems like this wrong...
Hi there. I have to determine the Lewis structure for NSF.
So first I thought of something like this:
N=S-F, with the nitrogen with four free electrons, the sulfur with two, and the fluorine with six. The formal charges gives -1 for Nitrogen, +1 For sulfur, and 0 for Fluorine. But the...
I am pondering on what the correct Lewis structure(s) for Nitrogen Dioxide (NO2) may be...
I have come up with 7 possible structures, but am unsure which are correct and which are not. I have compiled a small list of notes for your convenience and they are all in this picture.
Which...
Homework Statement
Draw the lewis structure for ClNO2
The Attempt at a Solution
When I first drew this I had two double bonds in between the N and the Os. However, the answer suggests only one is a double bond in the structure. Why is this correct? Aren't we suppose to balance the...
Homework Statement
Bond Order of NO-
Bond Order of NO
Bond Order of NO+
Homework Equations
No Equations
The Attempt at a Solution
I determined the Bond order of NO+ to be 3 due to their triple bond and the
Bond order of NO- to be 1 due to their single bond
Lewis Structures...
Homework Statement
ICl_4^-
Homework Equations
n/a
The Attempt at a Solution
I has 7 valence, Cl has 7*4. Ideally, they would be 8 and 8*4, and so.
(40-35+1)/2 = 2 bonds. //the +1 is from the negative charge of the ion
There are simply not enough bonds to go around, so when...
Homework Statement
I was taking a practice exam, and it asked for the "acceptable lewis structure for Diazomethane"
I had narrowed it down to two possible results but can't for the life of me figure out why one is more acceptable than the other. I attached a picture of the two choices...
i was asked to draw the Lewis structure of NO2-,
and to write the formal charge of any atoms. so in the picture you can see my tried (the red number is the formal charge).
now i also asked to decide what is the angle ONO. what i know is the shape of this molecule is Bent so the angle will...
tell me if i correct i tried to draw the Lewis structure of what i think is Barium peroxide
in the picture you can see the formula.
in red dot is the extra electron.
thanks.
I understand the idea of the Lewis Structure and the octet rule. What I don't know is where to place the atoms. And unfortunately my book doesn't explain it. They just draw the lewis structur and expect us to understand how they did it.
For example: Draw the lewis structure of H_2CO...
Is their a method for predicting the molecular shape of molecules without drawing the Lewis structure?
I am preparing for an ACS exam and would like to try to save some time on these problems. I think I could determine the steric number by counting the total electrons available, and...
Homework Statement
Consider the related molecules POF2-
and POF3. Choose all the following statements that are correct for both molecules.
Homework Equations
A) P atom is sp3-hybridised
B) The F-P-F bond angle will be approximately 109.5 degrees
C) Geometry around he P centre is...
a question in Lewis structure?
I know that Lewis structure is so easy to discuss ..but I have this compound :
SnCl2
when I drew the Lewis structure of its , I had to make Double bond between the Cl & Sn
..but a teacher told me once that when the Cl is not the central atom it can just make...
Lewis structure (Related! - Please Help!)
I have 2 problems, please help me!please! thank you so much!
Homework Statement
Can you tell me if I am correct?Thank you so much!I tried acd and ac but it's wrong! :( 1. Which of the following are true about the correct Lewis structure of the SeF2...
Homework Statement
write lewis structure for SOCl2.
Homework Equations
The Attempt at a Solution
.. .. ..
:Cl-S-Cl:
.. | ..
:O:
..
what i did was put S in the middle with a single bond on both side for Cl, each Cl has six dot. S has two at the top. I...
with lewis structures, if i come to 2 separate structures that both seem right, and i want to know which is right, and i check the formal charge, and get:
for one diagram
0:1:-1:1:1
and for the other
0:0:0:0:2
which is better, i guess what I am trying to ask is, is it preferable to...
if i am told to draw a lewis diagram for
PCl^{+}_{4}
does this mean a melocule of 1P atom and 4 Cl atoms, the whole molecule with a charge of +1 or is it 1 P atom and 4 Cl^{+} ions, giving the molecule a charge of +4
what does the lewis structure look like, is it P in the middle with Cl...
Hello everyone:
I was looking at Wikipedia's page on chloric acid (http://en.wikipedia.org/wiki/Chloric_acid) and was wondering if the Lewis diagram there is correct. I will not link directly to it as it has a high resolution.
It shows Cl with a lone pair of electrons having double bonds with...
Trying to draw Lewis structure for IF3. There's four atoms, so 32 electrons needed minus the 28 availabe (7 valence each) give 4 electron bonded pairs, which is 2 bonds... but there has to be at least 3. I'm stupid, what am I missing?
edit: never mind i got it
i am attempting to figure out the lewis structure/ bonding scheme for CH3NCO.
so far i have: O=C=C-N-H
l l
H H
the Hs are attached to the second C then the N
the formal charges seem to be ok
i have a formal charge of 0 for O...
Could you check these?
Which one of the following ions or molecules can act as a base?
H2S NH4 ALH3 CH3 NH2
I chose H2S. Is this correct?
Also I had to weire a resonable lewis structure for the molecule that has the following skeletal structure: O2NONO2
I wrote...
There are many different types of kidney stones, but the most common is calcium oxalate, CaC2O4. The pH range of blood is 7.2-7.3. The pH of urine ranges from 4 to 8.
Draw the Lewis structure of oxalic acid (H2C2O4) and the oxalate anion (C2O4-2).
H2C2O4 Ka1 = 5.6×10-2, Ka2=5.42×10-5...
3. Which of the following is the molecular shape of the ion, ICl4-?
A. Tetrahedral
B. See saw
C. Square planar
D. Square pyramidal
E. Trigonal pyramidal
I drew the lewis structure, 4 chlorines bound to an Iodine. Iodine has 7, Each clorine has 7 with 35 total, the bonds...
I am confused. Doing Lewis structures is like balancing an equation, putting it together till all the valence electrons work with each other, as far as I can tell. :tongue2:
However, some atoms have A TON of valence electrons, like gold which has 25, um, how would I connect it to other...