CHEMISTRY COMMUNITY

Chiara Berruto 1K

We know that only the elements that are in Group 3 or below can form an expanded octet, as they have unfilled d-orbitals, which Groups 1 and 2 do not have. This is absolutely correct. keep in mind that these elements dont necessarily always have an expanded octet and are completely happy with 8 ele...

Chiara Berruto 1K

bond length most greatly affects its strength, double and triple bonds are shorter and therefore stronger than a single bond but when comparing two single bonds it is important to look at electronegativity a greater difference in electro negativity between atoms suggests a stronger bond.

Chiara Berruto 1K

lone pairs should be placed as far apart from each other as possible since they have a very strong repulsion this would mean they should be placed on opposite sides (top and bottom)

Chiara Berruto 1K

A polarizable atom/ion is one that has an electron cloud that readily undergoes large distortions meaning the shape of the cloud is changed and influenced by other atoms pull. Larger atoms are more polarizable because the nucleus does not have as strong of an attraction on the farther electrons and ...

Chiara Berruto 1K

What is the easiest way to identify dipole interactions to be able to determine the polarity of a molecule?

Chiara Berruto 1K

sigma bonds are able to rotate on their axis and are a stronger where as pi bonds would break if they were rotated

Chiara Berruto 1K

Jonghwee Park 1K wrote:Why are sigma and pi bonds distinguished? More specifically, what makes something a sigma bond and what makes something a pi bond?

sigma and pi bonds differ in shape and the distribution of electron density.

for more see page 121 of the textbook

Chiara Berruto 1K

How do you determine the exact bond angle? I understand that based of lone pairs we can determine whether or not an angle will be less than 109.5 but is there a way to know the exact angle/ make a close estimate or do you have to look up the number.

Chiara Berruto 1K

When given two molecules that each have varying numbers of both single and double bonds how do you find out which molecule has greater bond lengths?

Chiara Berruto 1K

I was marked down on the midterm for using incorrect number of significant figures and I was hoping someone could give me a quick overview of the rules so it doesnt happen again. Thanks!

Chiara Berruto 1K

Whats the easiest way to determine the most stable resonance structure?

Chiara Berruto 1K

Free radicals are highly reactive molecules with an unpaired electron, they attack stable molecules in an attempt to "steal" an electron and are neutralized by antioxidants which donate an electron

Chiara Berruto 1K

What causes a dipole moment?

Chiara Berruto 1K

Trends don't apply to noble gasses and therefore F is the most electronegative atoms

Chiara Berruto 1K

Group number does not directly correlate to electronegativity, electronegativity is calculated using other methods however a general trend can be seen where atoms become more electronegative as you travel across a period and become less electronegative as you travel down a group

Chiara Berruto 1K

Since isoelectronic atoms have the same electronic configuration and valence electron number but different atomic radii do they have the same of different electronegativities?

Chiara Berruto 1K

For the third row of the periodic table, we don't put any d-orbital electrons in their ground state configurations as they don't have any in the d orbital. However, since their energy level is 3 (n=3), they are able to have more electrons. They have a whole new shell rather than be just n=2, so the...

Chiara Berruto 1K

Only 2 electrons can occupy a single orbital, one electron will be spinning up while the other spins down.

Chiara Berruto 1K

The fourth quantum number tells us the spin of the electron, it is called the spin magnetic quantum number. This correlates to the fact that two electrons in the same orbital cannot have the same spin.

Chiara Berruto 1K

Everything does have a wavelength that can be calculated using the DeBroglie equation. However large objects have such small wavelengths that they cannot be observed or detected (If a wavelength is smaller than 10^-18 it is considered undetectable)

Chiara Berruto 1K

Honestly as long as you know E=hv and v=c/λ you can manipulate them to get most of the formulas you need to solve the problems

Chiara Berruto 1K

The work function is the amount of energy required to expel a single electron from the metal

Chiara Berruto 1K

I would recommend doing all the assigned hw problems as opposed to doing only 7, this way after all the repetition you should have formulas memorized and know how to better approach all problems. All formulas and constants should be given though.

Chiara Berruto 1K

The experiment was key in discovering the one to one interaction between one photon and one electron. The experiment showed that electrons will only be expelled from the metal if the energy of each individual photon is high enough to remove an individual electron. More photons does not necessarily m...

Chiara Berruto 1K

Are there some cases where you'll have to use both the M=n/v and MiVi=MfVf equations in a problem? This wouldn't be likely to happen because the first equation is used to find molarity when given the moles and volume of a solution. If you know the moles of the solution then you wouldn't need to use...

Chiara Berruto 1K

Honestly you can do whatever works best for you. Personally I calculate the mass of the product for both reactants and compare which one is larger because typically after finding the limiting reactant you are asked to find the theoretical yield and this way you have already done that calculation. So...

Chiara Berruto 1K

It should always add to 100% but I remember Dr. Lavelle stating that it is a combustion reaction and the mass percentages given do not add up to 100 then it is likely the oxygen that is being left out and will make up the difference.

Chiara Berruto 1K

I would recommend writing it out in a chain that way it is easy to see what units are being cancelled out. This is also easy because it allows you to start with the given and work until you reach the desired units and you know you have come to your answer.

Chiara Berruto 1K

I was wondering how to determine the order of elements in a molecule when given its components?

CHEMISTRY COMMUNITY

Search found 29 matches

Re: expanded octet

Re: Energies

Re: 2 lone pairs

Re: Polarizability

determining dipole moment

Re: strength of sigma and pi bonds

Re: Sigma and Pi Bonds

Bond Angle [ENDORSED]

Bond strength of molecules [ENDORSED]

Sig Figs

Stability

Re: Radicals

Dipole causes

Re: Trends in periodic table

Re: Electronegativity of atoms

Isoelectronic atoms and their relative electronegativities

Re: Expanded Octet Rules

Re: # of electrons for a given orbital (homework 2.25)

Re: Electrons in an Orbital [ENDORSED]

Re: does everything have a wavelength

Re: Application of different formulas [ENDORSED]

Re: What is work function? [ENDORSED]

Re: Memorizing formulas test 2

Re: Photoelectric Effect Expirement [ENDORSED]

Re: When to use MiVi=MfVf

Re: Different ways of determining limiting reactants

Re: Mass percentage

Re: writing out conversions in one long line vs. steps

Order of elements in molecule