atomic doubt

i was studying the nodes and stuff portion of atomic structure. in the graph of radial distributon function ( let it be y here ) vs r , the number of times y=0 is equal to number of radal nodes. but how do we determine the number of peaks in the graph
41 Replies
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hardcoreisdead
hardcoreisdeadOP7mo ago
also the peaks signify that at that certain value of r , probability of finding an electron is pretty high , right ?
Jiya
Jiya7mo ago
number of peaks = number of nodes + 1
g-sus
g-sus7mo ago
usually u just start from minima, then u keep drawing graph with increasing peaks
g-sus
g-sus7mo ago
only in positive y axis and keep count of nodes (every time y=0), also last peak does not touch y=0
iTeachChem
iTeachChem7mo ago
Yed
g-sus
g-sus7mo ago
yes 👍
g-sus
g-sus7mo ago
i think hes talking about the psi^2 dv
iTeachChem
iTeachChem7mo ago
Lets confirm :)
g-sus
g-sus7mo ago
radial distribution function and radial probability function same thing na
hardcoreisdead
hardcoreisdeadOP7mo ago
any proof of that or its just a normal observation thats one way but there must be a way to just read the given orbital and determine it i didnt quite get what u wanted to convey
iTeachChem
iTeachChem7mo ago
Try reading ncert/watching the session on this.
hardcoreisdead
hardcoreisdeadOP7mo ago
i am talking about 4pi r^2 psi^2
g-sus
g-sus7mo ago
since he didnt say density i told psi^2 dr
hardcoreisdead
hardcoreisdeadOP7mo ago
yep am talking bout the last one
g-sus
g-sus7mo ago
ye determine nodes (n-l-1) and draw accordingly
hardcoreisdead
hardcoreisdeadOP7mo ago
or just deduce that no of peaks = nodes+1 , like u said
hardcoreisdead
hardcoreisdeadOP7mo ago
what about the no of angular nodes ?? the r max with the highest probability of finding electron
g-sus
g-sus7mo ago
basically s orbital starts from maxima hence no angular nodes
hardcoreisdead
hardcoreisdeadOP7mo ago
yeah since only s orbital dosnt have angular nodes we necessarily need the orbital for that ig
iTeachChem
iTeachChem7mo ago
From.equation Which is visible in psi 2 amd psi graph. Not in psi2dv
hardcoreisdead
hardcoreisdeadOP7mo ago
hmm since they are equal to azinuthal quantum number aight ig its all clear now
iTeachChem
iTeachChem7mo ago
Read. A. Book. :)
hardcoreisdead
hardcoreisdeadOP7mo ago
zumdahl mein kahan hai all this i couldnt find
iTeachChem
iTeachChem7mo ago
You will need these basics to solve qs on this. Doing it superficially wont help. Atkins has this.
hardcoreisdead
hardcoreisdeadOP7mo ago
and ncert lang is just way too weird to understand
iTeachChem
iTeachChem7mo ago
Are ye kya hai
hardcoreisdead
hardcoreisdeadOP7mo ago
ill download that g
iTeachChem
iTeachChem7mo ago
Zumdahl has it too afaik. Lemme see.
iTeachChem
iTeachChem7mo ago
iTeachChem
iTeachChem7mo ago
Yep. Hai. Don’t do Atkins unless you are targeting. a sub 5000 rank in jee adv I am being blunt. It is too much and only to be done once the basics are clear. Basics are excellent in zumdahl. @hardcoreisdead Yea. Again this is for psi and psi2. Not psi2dv
hardcoreisdead
hardcoreisdeadOP7mo ago
got thr page number thanxx +solved @iTeachChem
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