CHEMISTRY COMMUNITY

BriannaParrington-1B

1. Draw the lewis structure of an atom. 2. Count the number of lone pairs. 3. Count the number of bond (a double bond and a triple bond count as 1 bond in this case). 4. Add up #2 and #3 and that gives you a number. 5. The number found in #4 corresponds to hybridization. For example, 2=SP, 3=SP^2, ...

BriannaParrington-1B

Hello, I was wondering if there are specific molecular shapes we are to remember that are more important than others? Or is it important to remember all of them?

BriannaParrington-1B

For 4.9 I counted that the total of valence electrons of ICL3 was 28 electrons. When I drew the Lewis structure in order to figure out the molecular shape, I could only fit 26 electrons around all of the atoms when completing all of their octets. Therefore, I am assuming that Iodine has an expanded ...

BriannaParrington-1B

Is it true that we do not need to name on the final or did I misunderstand what Dr. Lavelle meant?

BriannaParrington-1B

What are the importance of sigma bonds?

BriannaParrington-1B

What if two atoms have the same type of bond? (ie. a double bond). Does this mean that they have the same length and strength?

BriannaParrington-1B

Additionally, part of the question was a comparison of two double bonds, each with two lone pairs. In this scenario, how would you discover which of the two bond lengths was longer? * Also, is it correct in thinking the lone pairs stretch out the bond length? I struggled thinking through this quest...

BriannaParrington-1B

Is there anything in particular that we must know about radicals other than how to identify them?

BriannaParrington-1B

Whatever structure has the lowest energy state(such as the most favorable formal charge) contributes the most to resonance structure; so if all that separates equally low energy states is the position of a double bond, then showing all the alternate double bond positions would be the correct thing ...

BriannaParrington-1B

Can someone explain to me the concept of VSEPR?

BriannaParrington-1B

I'm pretty sure the answer relates to formal charge. The correct lewis structure is the one that minimizes formal charge while at the same time maintaining the octet rule for elements that cannot break it. Using your example of oxygen, if we calculate the formal charge for an oxygen with 3 lone pai...

BriannaParrington-1B

what determines the lowest energy of a Lewis structure? What does it mean when it asks to draw the most stable lewis structure? Does the amount of bonds or lone pairs present in a lewis structure determine the energy or stability?

BriannaParrington-1B

what is the difference between formal charge and oxidation numbers? Do they relate to each other in any way?

BriannaParrington-1B

Just to add to this discussion, from my knowledge, if you were to count the number of valence electrons in a compound such as NO, nitrogen has 5 valence electrons and oxygen has 6 valence electrons. In total, the entire compound's total valence electron is 11. Therefore, there must be an electron th...

BriannaParrington-1B

If the trend of electronegativity is highest to the upper right of the periodic table, does that mean that electronegativity is the least in the bottom left corner of the periodic table? Is there a specific trend we are supposed to know besides the highest electronegativity being in the upper right ...

BriannaParrington-1B

Why is it that some elements form more bonds than others in an octet? What difference does it make if an oxygen atom completes its octet using a double bond and two lone pairs versus an oxygen atom completing its octet using a single bond and three lone pairs?

BriannaParrington-1B

Hello, can someone please explain to me the difference between electron affinity and electronegativity? What makes them different and what are their trends?

BriannaParrington-1B

Doesn't 4f^14 come first because when doing electron configurations, you list it in increasing principal quantum number(n)?

BriannaParrington-1B

What is the correlation between nodes and nodal planes and how can there be multiple nodal planes?

BriannaParrington-1B

Hi, I believe what the series describe are Principle quantum numbers(n), or shells as it's usually called. Shells determine the energy levels. Angular momentum quantum number(l) describes the orbital/shape of the subshells (I=0,1,2,3 corresponding to s,p,d,f), and each shell can contain several sub...

BriannaParrington-1B

Why does the 1s orbital exist but not 1p, 1d, or 1f?

BriannaParrington-1B

I am confused about the concept of orbitals. Are orbitals energy levels of electrons and what makes them significant and different from each other? What is the significance of nodal planes in different orbitals??

BriannaParrington-1B

Is the concept of kinetic energy is the excess energy after a light hits a metal surface and the energy required to eject electron(s) using the light (photons) is more than needed?

BriannaParrington-1B

I am confused about the concept of atomic spectroscopy. Can someone clear up this misconception for me? Thanks.

BriannaParrington-1B

Is the concept of light is that light acts with individual photons rather than acting like a wave?

BriannaParrington-1B

Can someone explain to me Bohr's Frequency Condition?

BriannaParrington-1B

If a a question such as F.5 asks for the mass percentage composition, but does not specify any numbers that would give a basis for how many sig figs I need in my answer, do I just use the usual methods for rounding off even though there are not a certain number of sig figs specified to use? Also, wh...

BriannaParrington-1B

What is the easiest way to perform dimensional analysis on chem problem? How do you know when to do dimensional analysis and when it is not needed?

BriannaParrington-1B

For a general problem such as finding the mass composition of a compound, is there a certain amount of significant figures that each answer has to have? Or do I just use the rules for rounding off and disregard the number of significant figures? I am also concerned about the mass composition needing...

CHEMISTRY COMMUNITY

Search found 29 matches

Re: basics of hybridization

Molecular Shapes to Remember for the Final

Help on HW#4.9 [ENDORSED]

Naming on Final

Sigma Bonds

Re: Shorter bond length always leads to stronger bond?

Re: Test 3 bond length question

Radicals importance

Re: Contributing to Resonance Structures

VSEPR confusion

Re: confusion about # of bonds in a Lewis structure

lowest energy & most stable Lewis structures

Formal Charge vs Oxidation Numbers

Re: Radicals

Re: ionic character

confusion about # of bonds in a Lewis structure

electron affinity vs electronegativity?

Re: homework 2.43 part e [ENDORSED]

Nodes and Nodal Planes

Re: Energy levels and Orbitals

Confusion about why there is no 1p, 1d, or 1f orbital? [ENDORSED]

The concept of Orbitals

Kinetic Energy [ENDORSED]

Confusion about Atomic Spectroscopy [ENDORSED]

Properties of Light [ENDORSED]

Bohr Frequency Condition [ENDORSED]

Re: All students read this sig fig post [ENDORSED]

Dimensional Analysis Help [ENDORSED]

Confusion about Significant Figures (F.5)