A covalent compounds which form covalent bonds between non metal atoms, which combine together by sharing electrons. Covalent compounds have no free electrons and no ions so they don't conduct electricity.

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108 views

Is there any experimental evidence for OClF5?

On page 88 and 89 of this document, the author laments that $\ce{OClF5}$ has still not been discovered. He says it would be "just about the ultimate possible storable oxidizer" (for rockets). (Note: ...
6
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1answer
67 views

Why are noble metals more electronegative then most metals?

I was researching about electronegativity when I looked up what a graph of electronegativity within the periodic table is. And, this appeared. I scanned it, matching up everything I knew about the ...
5
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0answers
32 views

Carbides of different elements

What property of the elements makes them forms different types of carbides like: $\ce{Be}$ and $\ce{Al}$ - $\ce{Be2C}$ and $\ce{Al4C3}$ (Methanides) contains $\ce{C^4-}$ ion $\ce{Na}$ and $\ce{Ca}$ ...
0
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1answer
48 views

What is the structure of NO2-?

I know that NO2 has 3 effective pairs, so it is likely to have trigonal planar structure. In trigonal planar structure we usually see three atoms bonded to central atom at 120°. But in NO2-, I ...
9
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1answer
73 views

Stable natural helium hydride?

Reading the transcript of the Royal Society of Chemistry podcast Helium Hydride, they state that helium hydride is possibly the most ancient compound to form in the Universe. They make the assertion ...
3
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2answers
139 views

Is there any way of representing a dative/coordinate covalent bond?

I was wondering if there was any way of representing a dative/coordinate covalent bond on a chemical diagram. A single bond can easily be represented as a single line, a double bond as a double line ...
7
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2answers
173 views

Why are pi bonds only formed when sigma bonds are formed?

While studying about bonding there was one statement that "pi bonds can only be formed only with sigma bonds" as we know that in double bond there is 1 sigma bond and 1 pi bond but then one question ...
3
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1answer
43 views

Will selenium react or bond, ionic or covalent, with vanadium?

I was recently asked if $\ce{Se}$ will bond with $\ce{V}$, creating a compound $\ce{SeV}$ . I am not sure if this is even possible but if so I'd like to find out.
2
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1answer
56 views

Hypervalency in elements in the second period

In my experience, most texts that address hypervalency say that it only occurs from elements in the 3rd period and onwards. This explains the occurrence of $\ce{Cl2O7}$ or chlorine heptoxide. However, ...
19
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1answer
1k views

Can 100% covalent bonds exist?

Every covalent bond has some ionic character and every ionic bond some covalent character. I can understand why a completely ionic bond is an ideal situation. But completely covalent bonds can ...
1
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1answer
56 views

Electron transfer in reaction between Ammonia and Hydrochloric acid

$$\ce{NH_3 + HCl -> NH_4Cl}$$ The ammonia is bonded so that the nitrogen has an outer shell with a lone pair of electrons. When they react, the hydrogen from the $\ce{HCl}$ moves to the ammonia, ...
7
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1answer
227 views

Does water ionically bond to chloride ion?

This user absolutely insists that when a chloride ion is present in water (for example, when $\ce{NaCl}$ dissolves in water) that $\ce{Cl-}$ ion is ionically bound to the hydrogen atom: ...
6
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1answer
99 views

Why are there more fluoride compounds formed with Xenon?

Based on WebElements, of the Noble Gases, $\ce{He}$ and $\ce{Ne}$ do not react with any of the halogens; however: $\ce{HArF}$ has been detected at low temperatures (thank you to @bon and @Martin in ...
9
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2answers
462 views

How come there aren't any silicon analogs of alkenes or alkynes?

We know that there are silicon analogs of alkanes, but according to Wikipedia, silicon analogs of alkenes or alkynes are virtually unknown. How come?
1
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0answers
24 views

What makes a metal more inclined to bond covalently? [duplicate]

Many metals form compounds with s-block elements that are essentially entirely ionic. However, elements like silver, copper, lithium and so on, can form bonds that are significantly covalent in ...
0
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1answer
47 views

Can covalently bonded hydrocarbons be influenced by a magnetic field?

I am doing a University project on Magnetically Assisted Combustion and am curious to know more about how magnetic fields may or may not affect gases such as butane and propane. I think I am right ...
3
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0answers
79 views

Why does Silver form bonds with covalent character?

Compounds of silver form particularly strong bonds which is accounted for by the significant covalent character of the bonding. Furthermore, is the tendency to form covalent bonds linked to the fact ...
1
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1answer
429 views

find percentage ionic character if electronegativity is given

Lets say that a in a compound A-B, electronegativity of A is x and that of B is y,what will be the percentage ionic character in terms of x and y? I have been taught that the percentage ionic ...
3
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1answer
119 views

How to rationalise the IUPAC name for tetrahedrane?

I'd like some assistance in understanding the IUPAC name for tetrahedrane. I understand the basics of polycyclic ring naming however this example has me confused.
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0answers
27 views

Am I right in giving the following reason for some questions relating to the p-block?

I'm seeking clarification as I believe this to be the answer to why boron compounds are electron deficient. While bonding, the $2s^2$ electrons of Boron are excited to the $2p_y$ orbital, they ...
0
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1answer
38 views

Build the geometric structure of SnBr2

What is Sn valence in this case? Because it depends on it if it will be linear or tetragonal.I'm talking about a molecule.
3
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1answer
134 views

How to know it when I see a covalent network?

This is a well-known (better said: well-discussed) question in the internet. When you look for answers for popular questions, you usually see them with a variable degree of reliability and complexity. ...
1
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2answers
59 views

Comparing the nature of ionic compounds

I want to know how to compare the strength or stability of ionic compounds. Example : $\ce{Mg(HCO3)2}$ and $\ce{NaHCO3}$ I know that polarity and polarizability affect the ionic and covalent nature.
6
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3answers
344 views

Why does SnCl2 occur despite the octet rule?

Shouldn't reaching an octet be any atom's "goal"? However, I've recently learned about cases that are either expanding octets, or have lesser than "enough" electrons for an octet abiding. e.g.: S in ...
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2answers
701 views

Why do simple molecular substances have weak intermolecular forces and why do giant covalent substances have strong intermolecular forces?

Why do simple molecular substances have weak intermolecular forces and why do giant covalent substances have strong intermolecular forces? I understand that in simple molecular substances the atoms ...
1
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1answer
79 views

What is a covalent semiconductor?

Aren't all semiconductors' atoms bond in a covalent bond? How is a "covalent semiconductor" different from other semiconductors?
3
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1answer
158 views

Where does the energy of formation of covalent bonds come from?

Consider two $\ce{H}$ atoms. Since the proton in one attracts the electron in another, they attract each other, and form a covalent bond ($\ce{H-H}$). Bond forming requires energy (436 kJ/mol for an ...
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2answers
168 views

The difference between peptide bonds and the bonds between polypeptides?

I was doing some tests for the multiple-choice final we've got ahead. And it was on me to count the peptide bonds in an Insulin hormone with 51 aminoacids arranged in two polypeptides with 30 and 21 ...
2
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1answer
342 views

Why doesn't nitric acid have a positive charge?

From the diagrams I've seen $\ce{HNO3}$ has a dative covalent bond so why doesn't it have a positive charge?
3
votes
1answer
937 views

Is a C-F bond stronger than a C-Cl bond?

In hydrolysis/nucleophilic substitution of haloalkanes, the bond enthalpy indicates the rate of hydrolysis (e.g. the $\ce {C-I}$ bond is weaker than the $\ce {C-Cl}$ bond so in hydrolysis the alkane ...
1
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1answer
44 views

Determine which orbitals will form hybrids with one another

I've been teaching myself chemistry, so any help is greatly appreciated. I've been reading an online tutorial that claims the two orbitals that merge in Aluminum trihydride are 1 orbital of 2s and 2 ...
3
votes
3answers
453 views

Why is PbCl₄ covalent?

My answer: The inert pair effect in $\ce{Pb}$ causes it to pull back the electrons, resulting in polarisation. My teacher's answer: An ionisation state of $+4$ is too difficult to achieve, and it is ...
1
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1answer
118 views

How do we experimentally know the strength of bonds?

How do we experimentally measure the strengths of covalent versus ionic bonds? Also, for a given molecule, how can we know if two pairs of atoms is covalently or ionically bound? Related question: ...
6
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1answer
2k views

Why can't carbon form an ionic bond?

My textbook says that a $\ce{C^{4+}}$ cation cannot be formed because it requires a lot of energy to remove 4 electrons. Formation of ionic bonds involve "removing" electrons and there seems to be ...
2
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2answers
712 views

Why do acids ionize in solution if they are covalently bonded?

Maybe I am wrong, but I thought acids were covalently bonded since hydrogen doesn't form ionic compounds. For example, wouldn't $\ce{HCl}$ look like: Since the electrons are shared, why does it ...
8
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5answers
709 views

Metal Compounds that bond covalently

I would like to ask if anyone has a list or knows which covalent compounds have metals in them. For example, beryllium and aluminium are both metals but they bond covalently with chlorine to form ...
2
votes
2answers
149 views

Why is the ionization energy for Hydrogen non-zero?

There are no other electrons to collide, repel and kick Hydrogen's single electron to a distant nucleus. And that a single electron is tightly attracted to the nucleus by the electrostatic energy ...
2
votes
1answer
5k views

Why is the bond in HF ionic while it is covalent in HCl?

Why would a hydrogen atom "donate" to Fluorine in an ionic bond but not in $\ce{HCl}$? Why would $\ce{H}$ and Chlorine share instead of $\ce{Cl}$ just stripping it away like $\ce{F}$ does?
4
votes
1answer
241 views

Which d orbitals of sulphur take part in the pi bonds of SO3?

In $\ce{SO3}$, 2 $p\pi-d\pi$ bonds are present. But which $d$ orbitals of sulphur take part in these $\pi$ bonds? The answer says $d_{xy}$ and $d_{yz}$. Someone also told me that crystal field ...
9
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1answer
340 views

Is BCl₅ possible?

Is $\ce{BCl5}$ possible? I saw it in book. As far as we can see there is no way to get 5 chlorine atoms with boron.
0
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1answer
89 views

Determining covalent bond strengths without hybridisation

Assuming pure $\ce{2s}$ and $\ce{2p}$ orbitals of carbon are used in forming $\ce{CH4}$ molecule, which of the following statements is false? (single choice question) Three $\ce{C-H}$ bonds ...
1
vote
1answer
984 views

Why is Aluminium Chloride a Lewis Acid if it's an ionic compound?

In my textbook it says in the reaction $\ce{AlCl3 + Cl- -> AlCl4-}$, Aluminium Chloride ($\ce{AlCl3}$) has six valence electrons and accepts a lone pair from $\ce{Cl-}$, but wouldn't that mean the ...
4
votes
1answer
443 views

How can sulphur and phosphorus expand their octet

There are many compounds, in which the stability of a molecule is not governed by the presence of octet configuration in central atom. In most of the cases the central atom is generally sulphur or ...
1
vote
2answers
197 views

Binary Molecular Compounds of Nonmetals

How does one determine the formula for two non metal elements? Such as Nitrogen and Oxygen. I look at the charges with Nitrogen having -3 and Oxygen having -2. How would I get to zero? How do you ...
4
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3answers
3k views

Bonding in the phosphate ion

I'm looking for an explanation of the bonding in the phosphate (PO43−) ion: (Image courtesy of Wikipedia) Phosphorus (15P) - being the fifteenth element - has fifteen electrons, five valence ...
1
vote
1answer
106 views

Why is silicon oxide giant covalent structure?

Why is silicon oxide giant covalent structure? Why it doesn't bond like carbon dioxide? Thank you
10
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4answers
7k views

Are metallic/ionic bonds weaker than covalent bonds?

In mineralogy class, I was taught that metallic and ionic bonds are weaker than covalent bonds and that's why quartz and diamond have such a high hardness value. However, in organic chemistry class, I ...
13
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3answers
4k views

Bond Length of CO+ is expected to be more than CO but it is found to be less. Why is this so?

According to Molecular Orbital Theory(MOT), the bond order of CO is 3. When CO+ is formed, bond order decreases to 2.5 and thus bond length should increase. However, the bond length of CO+ is found to ...
7
votes
3answers
5k views

The Crisscross method for finding the chemical formula

I am reading this wikipedia article that I don't understand. What I don't understand is: suppose we have two elements $X$ and $Y$ having oxidation numbers $x$ and $y$ respectively. Can we prove ...
2
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1answer
457 views

How would one compare the magnitude of covalent character between SnCl4 and SnF2 using Fajan's Rules?

It is easy to compare two ionic compounds when one of the ions is same. However, how do we compare two compounds if one of the ions is the same element but just has different charge and the other ion ...