CHEMISTRY COMMUNITY

Kristy 1F

The ion will have bigger polarizability when it is bigger, has less electronegativity and less positive charge. So I-has larger polarizability.

Kristy 1F

SO2 reacts with water. That’s the biggest impact.

Kristy 1F

Why in CH4, the H atoms have nagetive partial charge? The electronegativity of C is higher than H.

Kristy 1F

I know that hybridization lowering the enerey by permitting the formation of more bonds. But why permitting the formation of more bonds can lower the energy?

Kristy 1F

Hi, can someone explains the meaning of delocalization?

Kristy 1F

For single bonds, they have one sigma bond. For double bonds, they have one sigma bond and one pi bond. For tripe bonds, they have one sigma bond and two pi bonds. You can just remember that one bond is sigma bond and the rest are pi bonds.

Kristy 1F

(1) molecules, such as NO, with an odd number of electrons; (2) molecules in which one or more atoms possess more than eight electrons, such as SF6; and (3) molecules such as BCl3, in which one or more atoms possess less than eight electrons.

Kristy 1F

Hi, I’m wondering that the central atom should depends on the least electronegativity or the least ionization energy. And also, could you explain exact concept of electronegativity and the ionization energy.
Thank you

Kristy 1F

Hello, I’m wondering that if we still have discussion on Wednesday since the lecture on Wednesday has been cancelled.
Thank you

Kristy 1F

Dipole-dipole forces are attractive forces between the positive end of one polar molecule and the negative end of another polar molecule.The London dispersion force is the weakest intermolecular force. The London dispersion force is a temporary attractive force that results when the electrons in two...

Kristy 1F

Yes, I think the bond angles would be the same since all the shape are identical.

Kristy 1F

The repulsion of the lone pairs will change the angle between atoms which means it will change the shape of molecules

Kristy 1F

When atoms or ions are larger, have less electronegativity and less positive charge, they have more polarizability. When they have smaller size, more electronegativity and more positive charge, they have more polarizing power.

Kristy 1F

The oxygen is more electronegative.

Kristy 1F

VSEPR model explains experimenetally observed shape of molecules. Whereas the Lewis Structure just show a 2D representation of molecular shape and indicates approximate location of bonding.

Kristy 1F

When the atoms or ions have larger size, less electronegativity, and less positive charge, they have more polarizability.
When the atoms or ions have smaller size, more electronegarivity, and more positive charge, they have more polarizing power.

Kristy 1F

C-F bond is the strongest bond. Since the smaller the internuclear distance is, the stronger the bond is. According to their radius, the internuclear distance between C-F bond is the smallest, so CF4 has the strongest bond.

Kristy 1F

The central atom is the least electronegative one.

Kristy 1F

Is there any reason for the octet exceptions that elements in 13th column don’t have to complete octet？

Kristy 1F

The first ionization energies generally increase across the period, however, the first ionization energy of oxygen is lower than before, so as the S and Se element. Is there any explanation for this decrease? Should we remember that?

Kristy 1F

Yes, the photo below can give you the sequence of orbits:

Kristy 1F

The Lewis Structure of HClO is that O atom at the center bonded with H and Cl atom. However, the Cl atom is the least electronegative one except hydrogen, so why Cl atom is at the center of HClO’s Lewis Structure?

Kristy 1F

Since the -1 charge should be on more electronegative atom. And the oxygen atom is more electronegative.

Kristy 1F

When the formal charge（FC）is equal to 0, it is the most stable configuration, the more configuration is close to 0, the more stable the configuration is.

Kristy 1F

When the formal charge（FC）is equal to 0, it is the most stable configuration, the more configuration is close to 0, the more stable the configuration is.

Kristy 1F

You can simply figure this out by checking their electric configurations, the number of the electrons in the last s or p orbital would tell you.

Kristy 1F

It should be the least electronegative atom, except Hydrogen.

Kristy 1F

If you the Cl bonded to the H, there would be only 24 valence electrons

Kristy 1F

Since each Ca2+ combine with 2 (CH3CO2)-

Kristy 1F

Suppose that the mass of O atoms is 16g, according to the question, the percentage of O atoms is(100%-88.8%)=11.2%. Therefore, the molar mass of M2O would be 142.8g*mol^-1. So the molar mass of M is 63.4g*mol^-1, M is copper.

Kristy 1F

All non-zero digits are significant
Zeros between non-zero digits are significant
Leading zeros are never significant
In a number with a decimal point, trailing zeros (those to the right of the last non-zero digit) are significant

CHEMISTRY COMMUNITY

Search found 31 matches

Re: Polarizability

Re: Acid Rain

partial charge

Hybridizaiton

Delocalization

Re: sigma vs. pi bonds

Re: Exceptions to the Octet Rule

The central atom

Discussion

Re: Intermolecular Forces

Re: Bond Angles Between the Same shape

Re: lone pairs

Re: Polarizability Vs. Polarizing Power

Re: Electronegativity

Re: VSPER

Re: Polarizability Trend

Re: 2D 15)

Re: How to determine central atom

octet exceptions

The exception of ionization energies

Re: Electron Configuration

The center atom

Re: Perchlorate (ClO4)-

Re: Most Stable Configuration

Re: Most Stable Configuration

Re: Valence Electrons

Re: central atoms

Re: HClO3

Re: Why amount of CH3CO2- doubled for each Ca(CH3CO2)2

Re: F.7

Re: Sig Fig zero rules