Search found 14 matches
- Sat Nov 24, 2018 7:08 pm
- Forum: Hybridization
- Topic: Hybridization
- Replies: 1
- Views: 164
Re: Hybridization
Draw out the Lewis structure of the molecule and you can determine the hybridization through the shape made by the electron dense regions, which include both lone pairs and bond pairs. So a molecule with three electron dense regions (eg. AX3, AX2E) would have a trigonal planar shape and sp2 hybridis...
- Sat Nov 24, 2018 7:02 pm
- Forum: Hybridization
- Topic: double bonds
- Replies: 14
- Views: 1109
Re: double bonds
A sigma bond involves end-to-end overlapping of electron orbitals while pi bond involves overlapping of orbitals sideways. A pi bond does not consist of a sigma bond; a double bond consists of both sigma and pi bonds.
- Sat Nov 24, 2018 6:57 pm
- Forum: Hybridization
- Topic: hybridization problems
- Replies: 4
- Views: 376
Re: hybridization problems
You should draw the Lewis structure of the molecule first. You can determine the hybridization by looking at the electron densities (i.e. both the lone pairs and bond pairs)
- Sat Oct 27, 2018 2:06 pm
- Forum: Trends in The Periodic Table
- Topic: electron affinity 1F.11
- Replies: 3
- Views: 744
Re: electron affinity 1F.11
But why is that not the case for Be/Mg and Ga/In?
- Tue Oct 23, 2018 3:54 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: f-orbitals
- Replies: 2
- Views: 722
f-orbitals
I understand that (n+1)s orbital is filled before the nd orbital (ie 4s before 3d), but what about the f orbitals? When do the f orbitals get filled when we are determining electronic configuration (of Ba or Au for example)?
- Tue Oct 23, 2018 3:47 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electronic Config of tungsten (1E.13)
- Replies: 1
- Views: 684
Electronic Config of tungsten (1E.13)
The electronic configuration of tungsten as stated in the solutions is [Xe] 4f14 5d4 6s2. Why is it not [Xe] 4f14 5d5 6s1, like Cr:[Ar] 3d5 4s1?
- Tue Oct 23, 2018 3:43 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: 1E.13 7th Edition
- Replies: 3
- Views: 243
Re: 1E.13 7th Edition
Half full d5 and d10 subshells have lower energy and hence are more stable
- Mon Oct 15, 2018 9:07 am
- Forum: Properties of Light
- Topic: Speed of Light
- Replies: 41
- Views: 2593
Re: Speed of Light
The speed of light is always constant, and we are provided the value during tests and exams so we can just use whatever value they give us
- Mon Oct 15, 2018 9:04 am
- Forum: Properties of Light
- Topic: Light Intensity
- Replies: 4
- Views: 494
Re: Light Intensity
The difference between energy per photon E(photon) and the energy needed to remove an electron E(e-) would give you the kinetic energy E(k).
E(photon) - E(e-) = E(k)
In turn, E(k) = 1/2 MV^2, where M is the mass of the electron and V is the velocity of the electron.
E(photon) - E(e-) = E(k)
In turn, E(k) = 1/2 MV^2, where M is the mass of the electron and V is the velocity of the electron.
- Thu Oct 11, 2018 3:51 pm
- Forum: Photoelectric Effect
- Topic: Threshold energy
- Replies: 5
- Views: 4394
Re: Threshold energy
In the case of this equation, work function (referring to the energy needed to be put in) and threshold energy (referring to the frequency needed to eject an electron) can be used interchangeably.
- Thu Oct 11, 2018 3:47 pm
- Forum: Photoelectric Effect
- Topic: Work function
- Replies: 7
- Views: 522
Re: Work function
I think they are interchangeable when calculating with the equation even though they have slight differences. (work function is the energy that needs to be put in, while threshold energy is the frequency required to eject an electron)
- Tue Oct 09, 2018 3:15 pm
- Forum: Photoelectric Effect
- Topic: Photoelectric Experiment
- Replies: 2
- Views: 227
Photoelectric Experiment
What happens to the electrons that are displaced during the experiment? Does the metal end up with a slight positive charge?
- Tue Oct 02, 2018 11:37 pm
- Forum: Significant Figures
- Topic: Periodic Table Sig Figs
- Replies: 4
- Views: 1246
Re: Periodic Table Sig Figs
But in that case, does the number of sig fig for the final answer depend on what is provided in the question or the number of sig fig in the periodic table?
- Tue Oct 02, 2018 11:32 pm
- Forum: Molarity, Solutions, Dilutions
- Topic: Units when calculating volume
- Replies: 4
- Views: 3064
Units when calculating volume
I understand that Dr Lavelle mentioned during the lecture that we have to use the units "L" for volume in our workings when using the equation Minitial Vinitial = Mfinal Vfinal (because the units for M is mol/L), but seeing that the equation is almost like a ratio between volume and molari...