For questions about the various atomic structure theories, including the Bohr theory. Not to be confused with the actual arrangement of atoms in macroscopic solids ([solid-state-chemistry]) or newer quantum concepts ([quantum-chemistry])
Questions tagged [atomic-structure]
229 questions
11
votes
1 answer
Cause of uniform glow in cathode ray tubes
I got the following extract from a chemistry book (emphasis mine):
It is observed that current does not flow through the gas at ordinary pressure even at high voltage of 5000 volts. When the pressure inside the tube is reduced and a high voltage of…
M Shehzad
- 119
- 3
7
votes
2 answers
How is the potential energy between two atoms measured?
In class, we learned about the interatomic potential graph.
How does one actually measure the potential energy between two atoms experimentally to ensure the graph is correct? What device is used?
robert kiligan
- 81
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4
votes
1 answer
Excitation of hydrogen atom
I studied the Bohr's model of atom that says electron can jump to higher energy level by absorbing photon, but the quantum model says we have more than that (quantum numbers). Therefore, when the electron of hydrogen atom absorbs a photon, will it…
Zhentian
- 61
- 3
3
votes
2 answers
For hydrogen like atom, find velocity from potential energy
PE of system is given by $$\mathrm{U(r) = \frac{-Ke²}{r^3}}$$ assume bohr model to be valid Find velocity
For this I used $\mathrm{\frac{-PE}{2} =KE}$ and then used $$\frac{mv^2}{2} =\frac{Ke^2}{2r^3}$$ and $$mvr=\frac{nh}{2\pi}$$
However, I am…
user60302
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3
votes
0 answers
Energy levels of carbon and selection rules
Here is an atomic physics problem I am trying to solve:
The carbon ground state is $[He](2s)^2(2p)^2$. Suppose to excite an electron to the configuration $[He](2s)^2(2p)(3s)$. The spectroscopic terms associated to this configurations have energies…
Andrea
- 149
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3
votes
1 answer
Do electrons of opposite spin attract each other?
Electrons of opposite spin create magnetic fields that are opposite to each other. So, is it possible that, 'such electron pairs attract each other' or ' they distract each other less than electron of same spin'? Thanks.
tara
- 41
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3
votes
1 answer
Angular Momentum of an orbital and orbit
While pursuing forth in Atomic Structure, I encountered the following concepts...
According to Bohr, the angular momentum of an orbit remains quantized, i.e $\displaystyle mvr = n\hbar .$
But he wasn't able to expalin the reason that why is it…
Nikola Alfredi
- 141
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3
votes
3 answers
Bohr's model of an atom
This question is not very mighty. But I'm having a problem wrapping my head around the Bohr's atomic structure. The textbook says electrons revolve around the nucleus in fixed energy shells, with each shell having its different value for energy.…
user231094
- 125
- 1
2
votes
1 answer
Difference between probability and probability density of finding a particle in space
What is the difference between probability and probability density of finding a particle in space?
I am at basics of the wave function and this thing confused me.
Probability = $[\psi(x, y,z)]^2(\mathrm{d}x,\mathrm{d}y,\mathrm{d}z)$
Probability…
Iceberry
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2
votes
1 answer
What facts are being used in this atomic structure question?
I wish to understand how to solve this atomic structure question:
For the ground state, the electron in the H-atom has an angular
momentum = $\hslash$ , according to the simple Bohr model. Angular
momentum is a vector and hence there will be…
Gaurang Tandon
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- 11
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- 118
2
votes
0 answers
Stark and Zeeman effects and their causes
In high school we are taught that Zeeman and Stark effect directly lead to the findings of further divisions of an electron's shell in an atom.
What is exactly the reason that causes the spectral lines of an atom to split when an external magnetic…
Substitute_Y
- 95
- 5
2
votes
1 answer
What is the unit of the Rydberg Constant?
In the image, the Rydberg constant seems to have two units. How is that possible?
Happy Unicorn
- 121
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1
vote
1 answer
Can you determine when the orbtials of an atom will hybridize?
We know that when it comes to C its orbitals hybridize (they become sp3 , sp2 or sp) and the energy levels of an hybridized orbital of this kind is lower than that of the p orbital that formed it but higher than the s orbital so for example…
David Sterlinsky
- 170
- 7
1
vote
0 answers
How did Planck reach the conclusion that energy comes in packets based on black body curves?
I understand that if wavelength continues to decrease energy emitted by an atom would get to infinite, but how does the max wavelength at a particular temperature translate to discrete energy packets. Please explain.
Syncuvane
- 27
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0
votes
1 answer
Finding region of electromagnetic spectrum with wavenumber
A line with wave number $\pu{1.028\times10^{-2} nm^{-1}}$ is emitted in the spectrum of atomic hydrogen. In what region of the electromagnetic spectrum does this line occur?
Do we find this by referring to the range of wavelength for UV, IR, etc.,…
