Electronegativity Definition and 43 Threads

>-Atomic orbitals must be at the similar energy levels to combine as molecular orbitals, said Wikipedia. This is unclear. How do you quantify how "similar" means? I heard electronegative is tied to atomic radius is tied to atomic orbital energy. What are two atoms that would in theory form...

I understand that electronegativity and electropositivity are opposite terms, but does being high in one mean you are low in the other? I saw that HCl will react with NaCl to create Cl2 and NaH. I believe that Cl has the greatest electronegativiy (willingness to attract an electron). So...

Homework Statement I learned that Covalent Bonds form between different specific atoms ( with similar electro-negativity ) with electrons. However, I wondered what type of bond would form between the different atoms if they had no electrons? Also , if I have 2 atoms with similar...

Electronegativity has seen a number of scales throughout its years of existence. Starting from the Pauling scale to the Allen scale, Wikipedia has a long list. Recently, [SIZE=16px]Martin Rahm, Tao Zeng and Roald Hoffmann have defined a new scale for electronegativity. The news has been...

Homework Statement a) Calculate the differences in electronegativity between the elements in each of these compounds. I)CaBr2 II) Na3N III) CH4 b) Predict whether each of these compounds would be an ionic or a molecular compound and justify each prediction. c) Rank the bonds in these compounds...

Homework Statement Br2, KBr, and HBr Homework Equations none The Attempt at a Solution I understand that Br2 would be least electronegative because they both equally share the electrons, but i don't understand why KBr is more electronegative than HBr. This question was on my quiz, and i...

Why is the electronegativity of fluorine higher than chlorine but not electron affinity? How is it possible that it has a stronger attraction towards a bonding pair of electrons than when a new electron is added to the atom?

Homework Statement 1. Explain why a balloon sticks to a wall after being rubbed on your shirt (remember the wall is not metal and does not have "free" electrons") 2. Include a balanced force diagram that includes the electrical force and gravitational force (assume electrical force is twice...

Let's say we have two samples of pure Helium-4, and two other samples of pure hydrogen fluoride (consisting of Hydrogen-1 and Fluorine-19) all in separate containers. One container of each chemical is at the same initial temperature of 200°C at a pressure of 101kPa, and the other ones are at...

what sets xenon and krypton apart from the other noble gasses that enables them to have higher electronegativites?

Hi there, first poster here. Something has been boggling me and I cannot seem to find the answer anywhere. I really hope that you will help me =) A magnet train in vacuum has no friction whatsoever, right? Then what about electron interactions between the 'rail' and the train itself due to...

I propose the Pauling Scale is not valid in all circumstances, and other scales of electronegativity would do better to predict the behavior of electron density in molecules: Electronegativity seems to be poorly defined for such a widely used chemical property: a 'tendency' of an atom or...

Hi, everyone! Just a quick question to be sure: I want to calculate the electronegativity difference of Na_{2}O,\ \Delta X_{Na_{2}O}, Is this correct: \Delta X_{Na_{2}O}=X_{O}-X_{Na} Or is it: \Delta X_{Na_{2}O}=X_{O}-2*X_{Na} (since there are 2 Na atoms).

According to my A level Chemistry textbook, the presence of the O atom in a C=O bond in any carboxylic acid (CH3COOH, for instance) pulls the electrons towards it causing the O-H bond to "weaken", thereby making the molecule more susceptible to dissociation, or in other words, accounts for the...

Hi, If you rub woll against cotton, the cotton get's negatively charged and the wool positively charged. IS this because the atoms of the cotton are more electronegative? Or is it because the electrons of the wool attoms are more loosely held?

Hi! I would like to know if what I'm thinking is correct. Please help me as to I'm confused :cry: 1. If atom "X" has a high Electronegativity, then that means that it can take Electrons from atom "Y" with a low Electronegativity easily causing atom "X" to have a more negative charge "-" and...

does a reaction involving transfer of an electron between atoms with slight difference in electronegativity still count as a redox reaction?

Carbon is higher in the electrochemical series than hydrogen, which indicates it is more electropositive, but Pauling values show carbon as more electronegative - 2.55 vs 2.2!? Any reason / explanation for the apparent contradiction? Tried looking for an Eo value for C (should be more...

I've just started a course on organic chemistry and the professor said some things which did'nt exactly make sense to me: 1) In a period, atoms are more electronegative as we go to the right. The more electronegative an atom is, the more stable it becomes. 2) In a group, atoms increase...

Homework Statement 1. What is the molecular shape of Hydrazine N2H4 w.r.t. N atom? 2. H2S and H2O, which one has a larger bond angle? 2. The attempt at a solution 1. Trigonal Pyramidal is the answer given. But Hydrazine has 5 atoms around its central atom and I'm unable to fathom...

H20 is polar in nature. It is fundamentally because oxygen is more electronegative than hydrogen and the shared electrons tend to be near oxygen. This may be because the atomic number of oxygen is more than that of hydrogen. But in the bond I don't understand how the 2 shared electrons...

How does electronegativity affect bond strength? whats the strongest bond polar covalent, nonpolar covalent, or ionic how does electronegativity affect bond strength some people say the more electronegative the molecule the stronger the bond, so than shouldn't ionic bonds be stronger than...

Gold has rather high electronegativity. If that is the case then why does it often appear in nature in its pure form? I would think it would be attracting a lot of molecules and binding with other elements.

i wanted to ask this…. 1. if an atom forms a bond with some atom of different element,say C-O ,then since O attracts elec more ,can we say tht it now it has less electronegativity compared to only O? 2. in a tertiary carbon why do electrons get pushed towards the central C,is it because of...

I recently found a table of electronegativity differences, where certain differences where used to define certain types of bonds. However I found different values at different sites so I wonder if someone could help sort this out. Link 1...

Homework Statement I was studying about electronegativity from a book. Its written that as polarizing power increases, electronegativity increases. Also, the electronegativity increases as the s-character in the hybrid orbitals increases. I don't understand these two statements. I don't...

I'm taking AP Bio and we're covering basic chemistry needed for it. I've not had chemistry yet, so I'm left wondering about the interesting stuff, like electronegativity. Basically, what I'm interested in, is: why is H2O polar? What is it about O that makes it magnetically attract H...

for an atom that is an element in Period 4 , Group 7 to compare with another atom of element in Period 3, Group 5 Without looking at the Periodic table or electronegativity values, how can I determine which one of these two atom is more electronegative? (While Period 4, Group 7 has...

Between Sulfur and Iodine, which has more Electronegativity? I read that they both have the same, if so how can i determine in SI2 compound around which atom do the shared electrons spend more with with(Since that is determined by which atom has greater electronegativity) Or maybe they spend...

Can anyone explain concisely why Trifluoroacetic Acid is more acidic than Trichloroacetic Acid, but HCl is more acidic than HF?

Hey friends, I am having some confusion regarding covalent character of ionic bonds (Fajan's rules) and polar character of covalent bond (electronegativity and dipole moments). We apply Fajan's rules when we start a bond to be purely ionic, as in NaCl, and derive it's partial covalent character...

Because, if a higher electronegativity means a higher attraction to electrons an atom has, wouldn't that mean that a greater energy would have to be put into ionise an atom with a higher electronegativity?

Is there any method to compare the electronegativity of ions such as O-, N+, S-, O+?

Although the electronegativity difference between sodium and hydrogen in NaH is less than 1.7 , it is ionic bond WHY??

the temperature for the following to reach a pressure of 100mmHg is as follows(celcius)) HI -> -72.1 HCl -> -114 HBr -> -97.7 HF -> -28.2 how can this be? since they are all combinations of H and an element of the last column before the noble gas surely the smaller the size of the...

So acidity increases across a period because the electronegativity of the conjugate base increases as move from left to right. This means it can better stabilize the negative charge. Something else that contributes to this trend is the fact that as move from left to right across a period, the...

[SOLVED] Electronegativity Confusion Homework Statement Looking at the periodic chart and going down, the electronegativity goes down, ie Na = .9 and K = .8 From the definition electronegativity is the ability to attract electrons. So is that to say the more electronegative would actually...

As part of the exploration of one of the moons of Jupiter, a probe digs under the surface, where it finds a pocket of gas. It starts to do some on-board experimentation. The data stored in the probe's computer include the following table of Mulliken electronegativity values of gases. Element...

is there a relationship between the two? its been bugging me for a while. can't find the answer.

Why is NH2- a stronger base than H-. I would think that due to N's greater electronegatavity, it would want to hold on to its electrons more, making it less basic.

Carboxyl acid strength and electronegativity... How do they relate?? Here is a question that I had on a recent chem II exam. Which is the strongest acid? A. CH3COOH B. CF3COOH C. CCl3COOH (Cl for chlorine, not Carbon 13) D. CBr3COOH E. CI3COOH I selected choice A because the...

How do chemists measure electronegativity? Thanks, -Scott

Is there any theory as to why you have ClO-, ClO2-, ClO3-, and ClO4-, but only IO3- and BrO3- ? And why is there no FO3- ? I suspect this has something to do with electronegativety but I'm uncertain. And how come you have NO3-, but PO4 3-?