All Questions
17
questions
-2
votes
1
answer
81
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Why do we only use the principal quantum number to calculate the energy of an electron in an H atom? [duplicate]
According to my high school textbook the energy of an electron in a hydrogen atom is $E = -13.6/n^2~\pu{eV}$, where $n$ is the principal quantum number of the orbital in which the electron is present.
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0
votes
0
answers
67
views
Can someone elaborate what it means when its said that electron shells do not exist in multi electron systems?
I'm an undergraduate student in chemistry. I'm trying to grapple with all the new stuff we're learning and making sense of it. Now I want to know if electron shells really "exist" in multi ...
- 29
-2
votes
1
answer
127
views
How can Planck’s equation and the wave equation simultaneously coexist with contradicting each other? [closed]
The equations:
E=hf (Planck’s equation, where E is the energy, h is the Planck’s constant and f is the frequency) and
V=fλ (where v is the speed (in a vacuum), f is frequency and λ is the wavelength) ...
- 422
0
votes
1
answer
5k
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How do we write spin multiplicity for Mn(2+), Mn(7+)?
Mn has atomic number = 25
Since it is an exception to electronic configuration , unlike having = $\mathrm{3d^7}$ , it has electronic configuration = $\mathrm{3d^5,4s^2}$.
Formula for spin multiplicity ...
- 49
2
votes
0
answers
249
views
What will the correct value of spin quantum number for last electron of Na+ ion?
Electronic configuration of $Na^+$ ion is $1s^2,2s^2,2p^6,3s^0$.
I have noticed usually , we take spin quantum number as +1/2 first & then -1/2.
So , like for the above Q:It is for first 3e=+1/2 &...
- 49
1
vote
2
answers
689
views
Why can't the energy of an electron exceed 0 eV?
Today we were learning about atomic structure, our teacher introduced the mathematics of the 'Niels Bohr Model of Atom', and calculated the value of total energy $\frac{-13.6z^2}{n^2} \pu{eV}$. He ...
2
votes
2
answers
732
views
Relationship between Quantum Numbers and the Wave-function
I recently started learning about quantum mechanics and its applciations in atomic structure in chemistry.
In this inorganic textbook Inorganic Chemistry, it describes
"Each of the wavefunctions ...
- 197
0
votes
1
answer
387
views
Schrodinger's Equation and Wave Function
So I understand that there exists the shrodinger's equation, which on solving,gives the wave function of an electron. The wave function as I understand, gives all possible information about an ...
-1
votes
1
answer
147
views
What does orbital mean, exactly? [duplicate]
My teacher told me that orbital is the probability distribution data of the electron around nucleus which is amplitude data in a way.
An example of how my teacher actually told what it means involves ...
- 412
4
votes
3
answers
1k
views
Does electron mass decrease when it changes its orbit?
I have studied this in my chapter atomic structure that when an electron changes its orbit from lower energy to higher energy state , it does not state in my book that it moves there but that it ...
- 412
0
votes
1
answer
138
views
What does Pauli’s exclusion principle mean in atomic or fundamental way? [closed]
It means is that no electron can have same n , l and $m_l$ but can have two different spin quantum number.
I want to know why is this rule valid?Means there must be some other things happening also ...
- 412
3
votes
2
answers
1k
views
Why do subshells and orbitals exist? [closed]
I'm just a curious high school student. Sorry if this sounds dumb.
How exactly did the concept of atomic subshells and orbitals come about? And why exactly are there n-1 subshells and 2l+1 orbitals?
...
1
vote
0
answers
66
views
Why does ψ^2 ( square of orbital wave function ψ) give the probability of an electron in a given region? [duplicate]
Today I was introduced to the Orbital Wave Function for electrons.
$\Psi$ is a mathematical function for coordinate of electrons and has no physical meaning.
But $\Psi^2$ gives probability of an ...
1
vote
0
answers
175
views
What will happen if electron as a wave undergo destructive interference while travelling in its Orbit?
Today I came across a justification of Bohr's angular momentum quantization using the De- Broglie's hypothesis.
The justification said that since the electrons are having wave nature also then while ...
- 629
0
votes
1
answer
236
views
Quantization and Bohr's model
According to quantization it's said that emitted or absorbed energy is quantized.
Then, when it's said in bohr's model an electron changes its orbit (Let's say it goes to a higher energy shell from $...
- 137