CHEMISTRY COMMUNITY

America Ramirez 3H

it gives the number of nodes.

America Ramirez 3H

they're just molecules composed of two atoms, but the acronyms others have given are really helpful.

America Ramirez 3H

it's better if we try to memorize them and what helped me was physically drawing them out.

America Ramirez 3H

it is a good idea to memorize them and what helped me was physically drawing out different examples myself.

America Ramirez 3H

the difference is that electron geometry takes into account all regions of electron density, so lone pairs, and atoms, while molecular geometry only accounts for atoms to determine shape.

America Ramirez 3H

Electron geometry refers to the shape accounting regions of electron density, so lone pairs and atoms, while molecular geometry is the shape that accounts for solely atoms. During tests and like more formal you'd be using molecular geometry.

America Ramirez 3H

the molecular geometry shape.

America Ramirez 3H

I think it all depends on how many planes the molecule takes up.

America Ramirez 3H

as previously stated, it's because the tetrahedral shape takes up more than one plane so it doesn't have to stay in the 360-degree pattern.

America Ramirez 3H

yeah, steric numbers account for the regions of electron density.

America Ramirez 3H

yes you're right.

America Ramirez 3H

i think it depends on the number of other ligands attached to it and which shape would account for a greater space due to electron repulsion.

America Ramirez 3H

The difference is that electron geometry determines shape based on regions of electron density, so lone pairs, and atoms, while molecular geometry only takes atoms into account when determining shape.

America Ramirez 3H

bent and angular are both ways of describing that shape.

America Ramirez 3H

205323697 wrote:By how much would an angle go up or down if we added a lone pair?

I think only slightly because the lone pair does have a slightly stronger repulsion factor than atoms.

America Ramirez 3H

the difference is that electron geometry deals with the arrangement of electron densities (so atoms and lone pairs) while molecular geometry only deals with atoms.

America Ramirez 3H

I think slightly less than 90 degrees because of the lone pair repulsion.

America Ramirez 3H

the solid wedge means that when you are standing straight in front of a molecule that atom or lone pair is coming straight at you. A dashed line means while in the same position that atom or lone pair is shooting straight behind you.

America Ramirez 3H

They are two different shapes because the seesaw has 5 regions of electron density, trigonal pyramidal only has 4 regions of electron density.

America Ramirez 3H

bent and angular are the same thing.

America Ramirez 3H

sigma and pi bonds are formed by the overlap of orbitals. the difference is that sigma bonds overlap in one place (end to end overlapping) and pi-bonds overlap twice (side by side overlapping). All bonds (single, double, triple) have sigma bonds, double bonds have two pi bonds and triple binds have ...

America Ramirez 3H

I think visualizing individual examples of atoms and physically drawing them out myself has helped me.

America Ramirez 3H

yes because it is trigonal planar based on the lewis structure.

America Ramirez 3H

tetrahedral's aren't confined to only one plane which allows them to be more apart from one another and have higher bonds angle

America Ramirez 3H

I believe that the coefficients relate to how many regions of electron density the atom has.

America Ramirez 3H

the shape of the pi bond is basically like a ladder where you have two regions in the p-orbital that overlap and you cannot rotate one of the overlapping parts or a step in a ladder without breaking the whole thing. But with sigma bonds, since there is only one point of overlap it can rotate freely ...

America Ramirez 3H

yes everything is just one region of electron density no matter how many electrons there are.

America Ramirez 3H

you do count the lone pairs because it is still a region of electron density, and remember that a double bond is still only one region to count even though there are two bonds.

America Ramirez 3H

you basically have two regions of the p-orbital overlapping and you cant rotate one without rotating another and thus breaking the pi bond.

America Ramirez 3H

yes because electrons like to be in the lowest energy state possible so they would fill up lower shells first.

America Ramirez 3H

their energy levels are the same it's just how many electrons are being filled in the orbitals.

America Ramirez 3H

it would only be a small effect because the larger atom is obviously larger and would take up more space in the planes, but the difference wouldnt be too substantial.

America Ramirez 3H

I think to find the charge of the ligands you'd have to memorize from the chart. I don't know if there's a better way but that's what I did.

America Ramirez 3H

I watched a lot of my organic chemistry tutor on youtube and I thought how he did it was very helpful. He basically said to start off with finding the oxidation number of the transitions metal by making it an x in a variable equation and have all the other molecules' charges added up and equal to ze...

America Ramirez 3H

since the cisplatin has both of its chlorine atoms on one side of the molecule it is easier for it to bond to guanine and has a stronger bond.

America Ramirez 3H

what's the chemical formula for seawater? CH2O.

America Ramirez 3H

what do you call a tooth in a glass of water? a one molar solution.

America Ramirez 3H

why did the white bear dissolve in water? because it was polar.

America Ramirez 3H

why did the attacking army use acid? to neutralize the enemy's base.

America Ramirez 3H

so oxygen went ona date with potassium today... it went OK.

America Ramirez 3H

I think you would still count them because collectively describe the electronic bonding of a single polyatomic species including fractional bonds and fractional charges. It doesn't really matter the stability, each of the resonance structures are representing the same polyatomic species.

America Ramirez 3H

Bond length correlates to strength. If there is a shorter bond length that means that the bond is stronger because more energy is needed to break it. Longer bond length means that there's a greater distance between the atoms so it takes less energy to try to break them.

America Ramirez 3H

You can tell based on the charges of the atoms in the molecule. If any atom has any type of charge then it's an ion-dipole and if there isn't then it's a dipole-dipole.

America Ramirez 3H

You can tell from either the difference in electronegativity or how far away each atom in the molecule is from the periodic table.
If there is an electronegativity difference greater than 1.5 then that bond is ionic.

America Ramirez 3H

It's better to include the formal charge of an atom/molecule especially if the formal charge isn't zero.

America Ramirez 3H

For this equation, and the majority of other equations, you would use SI Units. So kg for mass, meters for wavelength, and meters per second for velocity.

America Ramirez 3H

Yes, Lyman =1 and Balmer =2.

America Ramirez 3H

Usually, anything smaller than 10^-15 m is undetectable for wavelength, in the context of the problems we're doing.

America Ramirez 3H

Hi, you would have to use the de Broglie wavelength equation, which is 入 =h/mv.
入 is wavelength
h is plank's constant (6.626*10^-34 J.s)
m is mass
v is velocity
for this question you would have to rearrange it to v=h/m入 to find the speeds of each different sub-atomic particles. Hope this helps.

America Ramirez 3H

Intramolecular forces are the forces that hold atoms together within a molecule. Intermolecular forces are forces that exist between molecules.

America Ramirez 3H

hi,
can lone pairs be an indicator of high reactivity in an element?

America Ramirez 3H

How can you determine a liquid has a high viscosity?

America Ramirez 3H

Hi,
Can someone explain to me what variable valance is?

America Ramirez 3H

Why is it that non-metals rarely lose electrons during chemical reactions? Does it have to do with their ionic bonds?

America Ramirez 3H

How can you determine which one is stronger, out of ionic, covalent and hydrogen?

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