Search found 16 matches
- Fri Dec 08, 2017 9:45 pm
- Forum: Properties of Electrons
- Topic: Velocity of Ejected electron
- Replies: 4
- Views: 6040
Re: Velocity of Ejected electron
Work function is the energy needed to release an electron from a metal surface.
- Thu Dec 07, 2017 5:04 pm
- Forum: Ionic & Covalent Bonds
- Topic: Strength of ionic v covalent bonds
- Replies: 2
- Views: 188
Re: Strength of ionic v covalent bonds
I believe the electromagnetically difference is referring to whether a compound is ionic or covalent bond. If the electronegativity difference between two atoms is greater than 2 then the compound is ionic. If the electronegativity difference between two atoms is less than 1.5 then it's a covalent b...
- Fri Dec 01, 2017 12:28 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Calculating Equilibrium
- Replies: 3
- Views: 819
Re: Calculating Equilibrium
Since the problem provides you with the value of Kc, plug that value where Br2 would have gone in the equation to solve for Br2.
- Fri Dec 01, 2017 10:06 am
- Forum: Lewis Structures
- Topic: Lewis Structure of IO2F2 (-2) Problem 4.23 [ENDORSED]
- Replies: 3
- Views: 4958
Re: Lewis Structure of IO2F2 (-2) Problem 4.23 [ENDORSED]
I believe Lavelle prefers the structure in which the formal charge is equal to zero.
- Thu Nov 30, 2017 10:21 pm
- Forum: Lewis Acids & Bases
- Topic: Lewis Structure
- Replies: 3
- Views: 366
Re: Lewis Structure
If the lewis structure has a positive formal charge it's most likely going to be an acid. If the structure has a negative formal charge it is most likely going to be a base.
- Fri Nov 17, 2017 6:09 pm
- Forum: Hybridization
- Topic: Double sigma v. pi bonds
- Replies: 4
- Views: 242
Re: Double sigma v. pi bonds
When there is a sigma and a pi bond that could mean there is a double bound between one atom and another, not that they are overlapping.
- Wed Nov 15, 2017 4:24 pm
- Forum: Hybridization
- Topic: Benzene Hybridization [ENDORSED]
- Replies: 4
- Views: 1047
Re: Benzene Hybridization [ENDORSED]
A carbon to hydrogen bond make up one sigma bond and since there are a total of 6 carbon to hydrogen bonds there are 6 sigma bonds there. Now the other 6 sigma bonds come from the carbon to carbon bonds. In benzene the structure is in a form of a hexagon that alternate single and double bonds. A car...
- Wed Nov 08, 2017 3:51 pm
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: Electron config of elements in 5d and 6d
- Replies: 4
- Views: 645
Re: Electron config of elements in 5d and 6d
As far as Chem 14A goes we do not need to know the configurations in the F-block. I believe Lavelle said to know the s-block, p-block, and the first row of the d-block in the periodic table
- Thu Nov 02, 2017 3:44 pm
- Forum: Resonance Structures
- Topic: Do all resonance structures need to be FC=0?
- Replies: 4
- Views: 809
Re: Do all resonance structures need to be FC=0?
Resonance structures that at formal charge=0, means that it's a stable bond. Typically we want to have a bond that is the most stable, not all resonance structures will have a formal charge =0 and it doesn't mean that structure is incorrect just less stable.
- Thu Nov 02, 2017 3:39 pm
- Forum: Hybridization
- Topic: Atomic orbitals [ENDORSED]
- Replies: 3
- Views: 451
Re: Atomic orbitals [ENDORSED]
A magnetic quantum number tells us the orbital an electron is occupying. It provides us with the amount of orbitals the electron has and the sub-shells.
- Thu Oct 26, 2017 3:49 pm
- Forum: Trends in The Periodic Table
- Topic: Transition Metals
- Replies: 3
- Views: 288
Re: Transition Metals
Transition metals are elements in group D, they are all metals that form cations with different oxidation numbers
- Fri Oct 20, 2017 1:04 am
- Forum: Photoelectric Effect
- Topic: Ionization in energy levels
- Replies: 4
- Views: 365
Re: Ionization in energy levels
ionization energy is another name for the work function in the photoelectric effect
- Thu Oct 19, 2017 3:09 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Wavelength Units
- Replies: 5
- Views: 418
Re: Wavelength Units
The problem itself will usually tell you whether it wants the final answer in nanometers or in meters. Make sure to double check it before coming up with the final answer.
- Thu Oct 19, 2017 3:05 pm
- Forum: Properties of Electrons
- Topic: h variable
- Replies: 2
- Views: 473
Re: h variable
Plank's constant is represented by the letter h. Frequency on the other hand is represented by a (v) like letter. Plank's constant (h) has a value of 6.626*10^-34 J*s. As opposed to frequency that does NOT have a constant value. For some problems you might be asked to find the value for frequency.
- Thu Oct 12, 2017 3:38 pm
- Forum: Properties of Light
- Topic: Wavelengths and Frequency of Electromagnetic Radiation [ENDORSED]
- Replies: 7
- Views: 650
Re: Wavelengths and Frequency of Electromagnetic Radiation [ENDORSED]
I don't believe he would ask about what color our answer falls in the spectrum because I think he just cares about our calculations and the answer. You can also try asking Lavelle personally since this seems like a question only he could answer.
- Wed Oct 11, 2017 8:00 pm
- Forum: Properties of Light
- Topic: Planck Constant [ENDORSED]
- Replies: 8
- Views: 740
Re: Planck Constant [ENDORSED]
From I remember Lavelle said that during tests we will be provided with constants so I wouldn't worry to much about whether we should round or use 4 sig figs.