Urgent questions - please help 🙏🙏🙏 (1 Viewer)

[eternallyboreduser]

they look rly similar to my tutors ones

who is ur teacher

 

[eternallyboreduser]

i attend zhangs 24/7

U have mr zhang?

 

[eternallyboreduser]

goated tutors goated resources

Ok thanks i think i’ll try out ms gu

 

[eternallyboreduser]

no i dont think he even tutors anymore

I think he tutors year 11 thursday physics on thursdays (according to the online timetable but that could be someone else) but ppl told me he was bad at teaching

 

[eternallyboreduser]

MS GU IS GOATED

Had ms gu today and she’s probably the best out of the teachers i’ve had so far (2 others) and maybe i’m dumb but I feel like some of her explanations r slightly flawed and confusing to understand but that could just be me and my stupidity

 

[eternallyboreduser]

Had ms gu today and she’s probably the best out of the teachers i’ve had so far (2 others) and maybe i’m dumb but I feel like some of her explanations r slightly flawed and confusing to understand but that could just be me and my stupidity

I also do it online so f2f is probably a better experience but it’s way too far for me to travel there

 

[skzzks]

I also do it online so f2f is probably a better experience but it’s way too far for me to travel there

yeah f2f is defs better coz she picks on people so it forces u to pay attention

 

[eternallyboreduser]

yeah f2f is defs better coz she picks on people so it forces u to pay attention

I still pay attention but i feel like she’s kinda mid at explaining/ has trouble explaining harder concepts

 

[eternallyboreduser]

I still pay attention but i feel like she’s kinda mid at explaining/ has trouble explaining harder concepts

But she only graduated last year so i can’t blame her for that

 

[Luukas.2]

1) In metallic lattices why and how do the electrons become delocalised?

2) How exactly does molecular mass increasing lead to an increased strength of dispersion forces? I understand that this leads to a higher probability of temporary dipoles forming but i’m unsure on how this acts on the strength

Thank you!!!

1. The valence electron(s) in the outermost sub-shell of a metal are located (relatively speaking) far from the nucleus. Packed into a lattice, these orbitals overlap an, in the case of metals, allow for continuous pathways between multiple atoms. Valence electrons can thus become delocalised and no longer bound to any single atom. In effect, the lattice of (say) iron metal consists of iron(II) cations with the two 4s² electrons from each atom free to move through a network of overlapping 4s orbitals. Most of the electrons remain bound to individual atoms / cations, relatively few are delocalised (in iron's case, no more than 2 to 3 / 26).

2. Increasing molar mass leads to an overall increase in strength of dispersion forces for two main reasons:

• First, a molecule with more mass has more electrons, and so the probability of a random distribution producing a distribution resulting in a transient dipole is increased.
• Second, with more electrons, the chances of a larger inequality (and thus a stronger transient dipole) is increased.

Thus, transient dipoles will form more frequently and will be, on average, greater in magnitude.

 

[Luukas.2]

@jimmysmith560, perhaps this thread belongs in the Chemistry forum?