CHEMISTRY COMMUNITY

Amir Akhavan 1E

I think it is important in naming the molecule and knowing its geometric shape. It could also be a question he may ask on the exam.

Amir Akhavan 1E

I am pretty sure he said there is no naming on the final exam.

Amir Akhavan 1E

Ligands need to have at least one lone pair in order to bind to the metal and form a molecule.

Amir Akhavan 1E

Molecules can have the same VSEPR formula. This formula is very helpful in determine the shape and bond angles of the molecule.

Amir Akhavan 1E

The formal charges do not have to be the same for the different resonance structures.

Amir Akhavan 1E

The bond angle is determined by the molecular shape of the molecule and the amount of lone pairs the molecule has. It is helpful to draw the shapes to visualize the angles better.

Amir Akhavan 1E

There is no general rule to follow when it comes to this. Every situation should be assessed differently.

Amir Akhavan 1E

Yes, all four terms relate to the same forces for our class.

Amir Akhavan 1E

The formal charge allows you to find the most stable form of the structure possible.

Amir Akhavan 1E

Electron affinity is the amount of energy released when an electron is gained. Another way of saying this would be how bad the element wants to gain an electron.

Amir Akhavan 1E

The octet rule must always be obeyed unless the atom has extra electrons which can be used from the d and f subshells. However you use the formal charge to help determine the correct lewis structure because the lower the formal charge the more stable it is.

Amir Akhavan 1E

Resonance structures are lewis structures which can have more than one possibility of forming the structure. An example of this would be by using different locations for double bonds for a structure.

Amir Akhavan 1E

You can only break the octet rule if the atom has extra electrons available from the d or f subshells. If not the rule cannot be broken and a maximum of 8 electrons must be used for that element. Only break the rule when it allows for a proper lewis structure to be formed.

Amir Akhavan 1E

Only draw all of them if the question asks you to draw all resonance structures. If the question does not ask you only need to draw one of them and it would be considered correct.

Amir Akhavan 1E

I don't think we will need to draw them on the test, however, I would be familiar with them just in case and to help understand the concept.

Amir Akhavan 1E

Professor Lavelle said we will not have to deal with any electron configurations past Krypton. However, this is just a general rule I would be familiar with. Similar to how the d block is one behind, the f is two behind.

Amir Akhavan 1E

The more stable it is the less reactive it will be because it already has a more desirable amount of electrons. Once Cl gains an electron it has a full octet and does not have a desire to gain any more electrons. Its properties will become similar to that of Argon.

Amir Akhavan 1E

I do not think we will need to know how to exactly calculate atomic radii but instead just to be aware of the trends occurring on the periodic table in regard to it.

Amir Akhavan 1E

2d does not exist because the first subshell for d is 3d and there is no such thing as a g orbital.

Amir Akhavan 1E

To find velocity you can just use the equation that wavelength equals planks constant over mass times velocity. You should know the mass of the object such as an electron which will be given.

Amir Akhavan 1E

Pi is simply used as a constant and the professor did not explain why this is used in this equation or how it was derived.

Amir Akhavan 1E

Write down the electron configuration and then draw the orbitals to get a visual of the unpaired electrons. The orbitals with only one arrow are unpaired.

Amir Akhavan 1E

Yes those are considered to be the valance electrons.

Amir Akhavan 1E

Electrons with parallel spin both spin in the same direction however the will occupy different orbitals because no two electrons in the same atom can have the same 4 quantum numbers.

Amir Akhavan 1E

My TA told us that we just need to have a general understanding of the order which helps know which waves have larger or smaller wavelengths and frequency.

Amir Akhavan 1E

The Professor said that the material must be able to conduct electricity and if not and electron will not be emitted after shining photons onto the object. Plastics are unable to act as conductors and thus the experiment would be unable to work.

Amir Akhavan 1E

It is always safer to use whatever is given on the formula sheet. However, more decimals will give a more exact answer which may be preferred.

Amir Akhavan 1E

I feel that reading the textbook is very helpful in getting a better understanding of the topics in much more detail. Although it seems intimidating at first, it is readable and highly recommended.

Amir Akhavan 1E

The direction does not matter as long as the two are perpendicular to one another.

Amir Akhavan 1E

The amplitude of a wave is defined as its height from the center line. The amplitude is very important in determining the energy of the wave because the larger the amplitude the higher the levels of energy will be as a result.

Amir Akhavan 1E

I think the answer would be choice D. The equation E= hv is the best answer because it creates a direct correlation between energy and the frequency.

Amir Akhavan 1E

I also think the answer should have only three significant figures instead of four. However, the professor said significant figures would not be counted on the first exam yet.

Amir Akhavan 1E

Stoichiometric coefficients should be whole numbers so therefore you should multiply all coefficients by 2. This would make the equation easier to understand as there would be no messy fractions.

Amir Akhavan 1E

No, it is not necessary to memorize any aspects of the periodic table. All needed information will be given for the first exam such as mass and atomic number.

CHEMISTRY COMMUNITY

Search found 34 matches

Re: Significance of Coordination Number?

Re: Naming on Final

Re: Ligands

Re: VSEPR

Re: Resonance Structures

Re: Bond Angle

Re: Bonds or Lone Pairs more important?

Re: London Dispersion, Induced dipole- Induced dipole, Van Der Waals

Re: Formal charge purpose

Re: electron affinity [ENDORSED]

Re: formal charge vs. octet

Re: Lewis Structure vs Resonance Structure

Re: octect rule

Re: Resonance Structures

Re: Shapes of orbitals

Re: f block elements

Re: Stability of Cl vs Cl-

Re: atomic radius

Re: HW 2.31 [ENDORSED]

Re: Calculating velocity

Re: Uncertainty equation [ENDORSED]

Re: Unpaired Electrons [ENDORSED]

Re: Valence electrons [ENDORSED]

Re: What does electron spin actually mean? [ENDORSED]

Re: Wavelengths

Re: Plastic vs Metal [ENDORSED]

Re: Planck's Constant Value [ENDORSED]

Re: Reading the textbook

Re: Electromagnetic Field [ENDORSED]

Re: wavelength description [ENDORSED]

Re: Post module quiz #25

Re: Questions F11

Re: Balancing equations with fractions [ENDORSED]

Re: Periodic Table Memorization [ENDORSED]