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For questions about determining Lewis structures (or their validity) for different chemical species. Do not use this tag if your question is about determining [oxidation-state] or [formal-charges], use the other respective tags instead.

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What does the Posner molecule (Ca9(PO4)6) look like?

Posner molecule - $\ce{Ca9(PO4)6}$ consists of tetrahedral anions $\ce{PO4^3-}$ and calcium $2+$ ions, but how should I start if I want to make a lewis structure of this molecule, so that I can ...
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0answers
29 views

Lewis structure of Hydrgogen thiocyanate (HSCN) [closed]

The lewis structure of hydrogen thiocyanate ($\ce{HSCN}$) can be written with a triple bond between $\ce C$ and $\ce N$. Now I'm wondering why can't I write it with a triple bond between $\ce S$ and $\...
2
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0answers
49 views

Linear algebra in Lewis structures?

In general, I have come across a phenomenon in chemistry where solutions to certain types of problems can often seem frustrating when trying to work out by hand, as they seem to depend on each other ...
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0answers
20 views

Oxidation state of N in NO from resonance

I know from a textbook that nitrogen has an oxidation state of +II in NO, and this is easily verified if O is assigned -II. However, if one looks at the resonance structure and assigns covalent ...
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1answer
21 views

How to identify the most stable lewis adduct?

This is a question from KVPY 2016 examination. In my first attempt, I focused on the positive charge that is going to appear on the donating atom. So lesser the electronegativity of the donor, the ...
2
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0answers
119 views

What studies show that d orbitals don't play an important role in covalent bonding? (> period 2 elements) [closed]

Take a look at all the following molecules: $\ce{SO3^{2-}}$, $\ce{SO2}$, $\ce{SO4^2-}$, $\ce{PF5}$ and many more you can add. In all these there is a controversy of one of these two types: Is formal ...
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0answers
33 views

Lewis structure of atoms and electron configuration

In chemistry textbook we usually see Lewis strucutre of carbon with 4 dots ( because it have 4 valence electrons). But my teacher say it's false representation of carbon, it's rather 2 dots( each dote ...
3
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1answer
85 views

How can I interpret the CH4+ structure?

I am trying to teach myself about Electron Ionization, and am very confused about the formation of the CH4+ Ion. Do the dotted lines between the C and the H, and between the two Hydrogens indicate a ...
7
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1answer
108 views

Lewis structure for magnesium diboride

What is the Lewis structure for $\ce{MgB2}$? I just read that it is a superconducting material (up to a relatively high critical temperature, 39 K) and am wondering if this has to do with its ...
0
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0answers
179 views

Why isn't N2O3 linear? [duplicate]

The $\ce{N_2O_3}$ molecule is shown to be branched, as so: Here, the formal charge of the left-most $\ce{N}$ atom is 1, and the formal charge of the bottom-left $\ce{O}$ atom is -1. However, a linear ...
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0answers
35 views

Why doesn't the arsenate ion have two double bonds?

The commonly described arsenate anion has a double bond between the arsenic atom and one of the oxygen atoms. This makes the arsenic ion have a formal charge of 0, and all of the oxygens have a formal ...
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0answers
256 views

Lewis structure of ClO radical

The commonly shown structure of the ClO radical described here has a single bond between the chlorine and oxygen atoms. In that structure, chlorine has a formal charge of 1, and oxygen has a formal ...
0
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0answers
45 views

Lewis Structure of SO3 [duplicate]

regarding to the SO3 structure, so it's better if the formal electron is equal to zero rather than applying the octet rule?
0
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1answer
96 views

What is the lewis structure of NO [duplicate]

I am a bit confused about the lewis structure of $\ce{NO}$ The answer from my worksheet is $\ce{N=O}$ with nitrogen having a free radical. But I drew the structure as N triple bonded to $\ce{O (:N#O:)}...
1
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0answers
210 views

What is the Lewis dot diagram for molybdenum and cerium? [closed]

How do I draw a Lewis diagram for $\ce{Mo}$ and $\ce{Ce}$? I am a bit confused since they are transition metals. Attempt The outer electron configuration for $\ce{Mo}$ is $\ce{5s^1 4d^5}$. The number ...
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0answers
6k views

SO3-2 Lewis structure

so I was trying to draw SO3-2 Lewis structure and when I looked it up on the internet I found it different to the one I've drawn This is the one I found on the internet, mine was without a double ...
2
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0answers
46 views

Question about resonance structures [duplicate]

I stumbled upon an exercise asking to draw the resonance structure of $\ce{SO4^{2-}}$. We can choose between the resonance structures by calculating the formal charges and by checking which one gives ...
2
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1answer
208 views

How can chlorine have 10 electrons around it in chlorine trifluoride?

I'm relatively new to chemistry, and while doing some exercises about $\ce{ClF_3}$ I tried to draw where the electrons are. I checked Google and got this: How is this structure possible? From what I'...
0
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1answer
101 views

Structure of PH4Br [closed]

What is the structure of PH4Br? I wanna know which atom is bonded to which. Does all five atoms are directly bonded to phosphorus?
3
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2answers
1k views

Is SbF5 symmetrical?

SbF5 forms a trigonal bipyramidal shape. There are polar bonds present and I assumed that it is non polar because of it's molecular geometry. However, The molecule itself is not entirely symmetrical (...
0
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2answers
537 views

Rules to identify the most stable resonance structures

While studying resonance from this Chemistry LibreTexts article, I found the rules to follow in order to decide which structure is the most stable. Among them: The structure with the least number of ...
0
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2answers
3k views

Lewis Structure For H2SO4

When I was drawing the lewis structure for $\ce{H2SO4}$ I got this configuration, now I know this isn't the best configuration but I don't see whats wrong with it. The number of valence electrons is ...
5
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1answer
362 views

Where do the lone pairs go in the “true” resonance structure?

Consider the "true" resonance structure of $\ce{CO3^2-}$: The bottom diagram leaves out the 2 lone pairs, so 4 electrons disappeared in the bottom image as compared to the top one. Are these ...
4
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1answer
564 views

Formal charges on polyatomic ions

Why is it that sometimes a polyatomic ion's Lewis structure is adjusted to remove the formal charge on the central ion, but sometimes it is not? For example, in the $\ce{I3-}$ ion (triiodide), the ...
0
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1answer
436 views

Lewis dot structures of CO2

I know the general Lewis dot structure of carbon dioxide is the one where there are two double bonds connecting oxygens to carbon. However the question is, does $\ce{CO2}$ have resonance structures? ...
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1answer
9k views

Lewis Structure of SO2 [duplicate]

What is the structure of SO2? I have seen two different ways the Lewis Structure is written: The formal charges of the SO2 with the single bond and a double bond is larger than the SO2 with two ...
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1answer
265 views

Chemical structure of xenon heptafluoride anion

When $\ce{XeF6}$ acts as a fluoride acceptor, $\ce{XeF7-}$ is formed. What is the hybridisation, geometry, and shape of $\ce{XeF7-}$?
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0answers
44 views

How can chlorine form ClO2? [duplicate]

Doesn't it have only have one bonding electron? Then how can it bond with 2 oxygens? The Lewis structure doesn't make much sense to me.
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2answers
408 views

Misleading features of Lewis Dot Representation

Today I had an embarrassing experience when I sat to help my nephew learn Lewis' Dot Representation and realized that I actually don't get it at all. I have a physics background and always thought ...
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1answer
369 views

Difference in bond orders between formaldehyde and carbonate [closed]

So I am asked to find the bond order for both of them. I drew the correct Lewis structure, and there's one C-O double bond (and 2 other single bonds). I determined the bond order in CO3 (2-) to be 1....
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1answer
92 views

Major contributor for resonance [duplicate]

I was doing some practice problems, and apparently 6 is the main contributor, due to having all full octets, but I'm not seeing how the oxygen with the + formal charge has a full octet in this case. I ...
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1answer
204 views

Polarity of symmetric Lewis structure [closed]

Why is $\ce{CF2Cl2}$ polar? The Lewis dot structure shows the molecule as being symmetric. Wouldn't that make it nonpolar?
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0answers
120 views

Does moving 2 sets of pi bonds/lone pairs in single resonance structure make conceptual sense?

I don't know how to phrase this better, but can a resonance structure have 2 sets of pi bonds/ lone pairs moved? So 4 total arrows drawn.This is happening on some very big molecules in my homework. ...
2
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1answer
714 views

How to identify lewis acids and bases

What is the general methodology to identify Lewis acids and bases in an acid base reaction? Do we need to draw structures to identify which species is the electron donor and which one the acceptor, or ...
4
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1answer
754 views

Do atoms react to fill outer shell or 8 valence electrons? [duplicate]

I recall in middleshool chemistry we simply said electron shell configurations were 2,8,8,many which I would have no problems with. But now I'm learning that shells contain $2n^2$ electrons where n ...
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1answer
252 views

Which of the following Lewis Structures is NOT correct? [closed]

Which of the following Lewis Structures is NOT correct?
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1answer
299 views

The MO and unpaired electrons

I am learning molecular orbital in general chemistry. I have come across this question that asks me to show that the Lewis structure of $\ce{O2}$ is actually an excited state when viewed in terms of ...
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1answer
1k views

AP Chemistry Practice exam [closed]

It's starts off the question with "Propanoic Acid, $\ce{C2H5COOH}$, is an organic acid that is a liquid at room temperature. An incomplete Lewis diagram for the propanoic acid molecule is provided in ...
3
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2answers
310 views

Why does this compound have two benzene rings? [duplicate]

If we look at carbons 1 and 2, they have 5 electrons. 3 are directly involved in bonding, and 2 are involved in delocalisation to create the 2 benzene rings. This would mean that they had 5 valence ...
0
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1answer
323 views

Why is arsenic trichloride more likely to be polar than aluminum trichloride?

According to my chemistry teacher, $\ce{AsCl3}$ is more likely to be polar than $\ce{AlCl3}$. Why is this? As I understand it, the difference in electronegativity is what makes a compound more or less ...
3
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1answer
151 views

Is it possible to use the school supplied algorithm to build the Lewis diagram of the iodate ion?

I am upgrading the grade 12 chemistry credit and have to use the school supplied algorithm to build the Lewis diagram of $\ce{IO3-}$ ion. It seems to me that iodine oxidation state in this ion should ...
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1answer
236 views

Lewis Structure of Fe4(SiO4)3

I'm a first year university student and am working on a paper regarding factors that affect how far an asteroid will penetrate into the Earth's atmosphere before exploding. One of the factors I came ...
1
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0answers
52 views

Valid resonance contributors for 2-methylthiazole [duplicate]

There's a problem from an old exam that I was trying to do. The original structure is given on the left and they want all the possible resonance forms that have closed-shell atoms (octet for S) and ...
1
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0answers
3k views

Hybridisation of POCl3 [duplicate]

I was doing lewis structures and i came across a question asking the structure of POCl3. Here, the answer is a tetrahedral shape with P as central atom connected to 3Cl atoms by a single bond and 1 ...
2
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0answers
988 views

How can the formal charge of the B in the Lewis structure of BF4(-) ion be minus one?

How can the formal charge of the $\ce{B}$ in the lewis structure of $\ce{BF4-}$ ion be minus one ? I draw the lewis structure of $\ce{BF4-}$ ion such like the following: I put $\ce{B}$ in the ...
0
votes
1answer
549 views

Lewis structure for SO4 (2+)

This was a question on a review sheet for Lewis structures. Now I could draw $\ce{SO4^2-}$ with no issues, but I can't make sense out of $\ce{SO4^2+}$ because I can't even make bonds to all $\ce{O}$ ...
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1answer
184 views

Are Lewis Structures the same throughout solids, liquids, and gases?

For example, is the lewis structure for water constant even when it is in a solid, liquid, or gas phase?
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2answers
644 views

Why is HCN not a Base and why does HNC does not dimerise?

We know that species that have a lone pair of electrons are Lewis bases (like ammonia). The structue of $\ce{HCN}$ is $\ce{H-C#{N:}}$; nitrogen has a lone pair of electrons and it is still acidic. Why?...
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2answers
123 views

Nitroxyl anion electron structure

Is the $\ce{NO-}$ a radical species? If so, can someone please explain why because $\ce{NO}$ has an odd number of electrons (11), so adding an additional electron would give 12 valence electrons and ...
3
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2answers
152 views

With molecular formula, how do I know if it linear or one element surrounded by other elements?

If I was given a molecular formula (i.e, PoOBr2), how do I know if the Lewis structure is linear (4 in-a-row, basically a straight line) OR it is an element surrounded by other 3 elements? I know ...