Search found 18 matches
- Mon Dec 04, 2017 10:27 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Pi and sigma bonds [ENDORSED]
- Replies: 7
- Views: 784
Re: Pi and sigma bonds [ENDORSED]
Pi and Sigma bonds don't change with resonance structures. As you create the lewis structures, you understand that the representations do not accurately represent the molecule.
- Mon Dec 04, 2017 10:22 am
- Forum: Polyprotic Acids & Bases
- Topic: Polyprotic Acid Ka [ENDORSED]
- Replies: 3
- Views: 979
Re: Polyprotic Acid Ka [ENDORSED]
Yes. Acids have as many Ka values as the H that it has.
- Mon Dec 04, 2017 10:14 am
- Forum: Significant Figures
- Topic: Significant Figures [ENDORSED]
- Replies: 3
- Views: 615
Re: Significant Figures [ENDORSED]
To get a value lower than the actual makes me believe that you rounded values as you continued solving. Significant figures comes into play at the end, once the answer is determined. I do not believe you will get full credit because of that but perhaps you will only lose one point.
- Mon Dec 04, 2017 10:11 am
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: H20 Dentate [ENDORSED]
- Replies: 2
- Views: 419
Re: H20 Dentate [ENDORSED]
Since it is the oxygen that will bond with the metal central atom.
- Sun Nov 19, 2017 7:43 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Double bonds vs. single bonds
- Replies: 4
- Views: 618
Re: Double bonds vs. single bonds
The VESPR model of CO2 is linear. Although it has a total of 4 bonds, the bonds are simply summarized as existing between the Carbon and O's. To answer your question, the existence of double bonds is disregarded in VESPR models since it would get too hectic to include their interactions in the model.
- Sun Nov 19, 2017 7:19 pm
- Forum: Hybridization
- Topic: Pi Bonds
- Replies: 2
- Views: 450
Re: Pi Bonds
It comes down to the way the bond forms. If we look at the double bond in carbon atoms, there is a pi bond forming above and below the plane of the carbon atoms. The bond, which is enabling the sharing of an electron, breaking would imply the p-orbitals not overlapping and allowing the sharing. Sinc...
- Sat Nov 11, 2017 10:56 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Radicals
- Replies: 2
- Views: 405
Re: Radicals
In molecular shapes, the radicals are less repulsive than paired e-. As such, if a radical replaced a pair, the other atoms would get closer to the unpaired e-, and the angle, wider.
- Sat Nov 11, 2017 10:46 pm
- Forum: Resonance Structures
- Topic: Resonance Structures and Molecular Shapes
- Replies: 1
- Views: 440
Re: Resonance Structures and Molecular Shapes
When you find the shape of a molecule, sometimes you will end up with a shape that has several atoms connecting to the center. If the center only needs 8 e- and you have plenty of electrons then things are fine. Resonance structures come into play when these connecting atoms can be changed around. I...
- Sun Nov 05, 2017 12:06 am
- Forum: Determining Molecular Shape (VSEPR)
- Topic: Shapes
- Replies: 2
- Views: 423
Re: Shapes
It is bent and not linear when unpaired e- are present. As such, when writing the lewis structure, when the element has lone pair- e- and is connected to two other elements, you can tell it will be bent. In other words, when the central element is bonded to two other elements and has at least one lo...
- Sun Nov 05, 2017 12:01 am
- Forum: Lewis Structures
- Topic: Cl as an Expanded Octet
- Replies: 3
- Views: 5801
Re: Cl as an Expanded Octet
Since Cl is in the 3rd period, and at the end, is more likely to gain e-, it is possible for it to take electrons if needed. An example of this is ClF3.
There are 28 e- and F will not take more than 8 leaving Cl with an extra 4 e-.
There are 28 e- and F will not take more than 8 leaving Cl with an extra 4 e-.
- Sun Oct 29, 2017 7:42 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Confusion regarded e- configuration
- Replies: 3
- Views: 530
Re: Confusion regarded e- configuration
its done through energy level so it should be 1s 2s 2p 3s 3p 3d 4s 4p, etc. the d comes after the p.
Of course, you can substitute a noble gas in the notation to make it shorter, e.g. Ni = [Ar] 3d^8 4s^2
Of course, you can substitute a noble gas in the notation to make it shorter, e.g. Ni = [Ar] 3d^8 4s^2
- Sun Oct 29, 2017 7:38 pm
- Forum: Trends in The Periodic Table
- Topic: electron shielding 2.37(c) [ENDORSED]
- Replies: 3
- Views: 587
Re: electron shielding 2.37(c) [ENDORSED]
This is because when an electron has a position closer to the nucleus, l=1 or even 1=0, it blocks off more attraction than one in a position after it, in this case l=2.
- Mon Oct 23, 2017 12:15 am
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: D Orbitals [ENDORSED]
- Replies: 1
- Views: 314
Re: D Orbitals [ENDORSED]
d has its special set. As the Professor mentioned, they are xy, xz, yz, (x^2) - (y^2), and z^2.
It does not appear to be important though but it wouldn't hurt to know the major differences, in terms of planes, between the 1st three and other two.
It does not appear to be important though but it wouldn't hurt to know the major differences, in terms of planes, between the 1st three and other two.
- Mon Oct 23, 2017 12:08 am
- Forum: General Science Questions
- Topic: Single Electons
- Replies: 1
- Views: 644
- Mon Oct 23, 2017 12:06 am
- Forum: Properties of Light
- Topic: The uncertainty principle [ENDORSED]
- Replies: 5
- Views: 831
Re: The uncertainty principle [ENDORSED]
Only at the subatomic level do outside forces, such as those incurred by measurement (for example, with a light to start time) affect the recording of the data. Because they are so small, and can be easy influenced by everything.
- Sun Oct 15, 2017 9:41 pm
- Forum: Wave Functions and s-, p-, d-, f- Orbitals
- Topic: Orbitals as Probability
- Replies: 2
- Views: 456
Re: Orbitals as Probability
Since you cannot know the exact location of an electron in its orbital at all times, orbitals are depicted as clouds of probability. The only thing you can know for sure is that an electron can be find in the cloud, because of the pull from the center, the electron has to remain within a certain ran...
- Sun Oct 15, 2017 9:36 pm
- Forum: Properties of Light
- Topic: Lyman vs Balmer Series
- Replies: 4
- Views: 598
Re: Lyman vs Balmer Series
In the Lyman series, eletrons come to rest at n=1 whereas in the Balmer series, they come to rest at n=2. The latter records the light depicted in the visible light spectrum, the former records the light in the UV spectrum. Their are other series as well, but in short, the different series simply re...
- Sun Oct 15, 2017 9:16 pm
- Forum: Properties of Light
- Topic: Planck's Constant
- Replies: 10
- Views: 1283
Re: Planck's Constant
It can also be used to find E (Energy) when the frequency is not known. To do this, you would use the relation v has with c (speed of light) and λ (wavelength). This results in the equation: E = (hv)/λ The constant is also used in the uncertainty principle. Max Planck received a Nobel Prize in 1981 ...