All Questions
109
questions
-1
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147
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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
1
vote
1
answer
67
views
Why does covalent bonding not break down if observer effect can be applied to atomic electrons? [closed]
The observer effect in quantum mechanics states that when unobserved, quantum particles such as electrons can simultaneously occupy two different states. In an atom of any element, where there are ...
- 99
1
vote
1
answer
97
views
Could observer effect cause electrons in one orbital to be found in another?
The observer effect states [1] that
when unobserved, absolutely small particles like electrons can simultaneously be in two different states at the same time.
If we look at an atom of any element, ...
- 99
3
votes
1
answer
394
views
While calculating the effective nuclear charge, why don't we consider effect of outer electrons on inner ones? [duplicate]
When calculating the effective nuclear charge for an electron, why do we only consider the repulsive effect of the inner electrons on the outer electrons? The outer electrons also repel the inner ones ...
- 235
1
vote
0
answers
295
views
Why doesn't core charge increase down a group? [closed]
Atomic radius increases down a group because the electrons feel a lesser attraction to the positive nucleus (due to shielding from inner shells). Why then, doesn't core charge decrease seeing as core ...
- 151
1
vote
1
answer
572
views
Atomic emission spectrum assumption n_f = 3
It's a standard question on the atomic emission spectrum.
An atomic emission spectrum of hydrogen shows three wavelengths: 1875 nm, 1282 nm, and 1093 nm. Assign this wavelengths to transitions in ...
- 205
0
votes
0
answers
19
views
Electron shells and subshells energies [duplicate]
According to what i learned in university, the energy of orbitals increases when the principal quantum number n increases. Also, in a given shell, s orbitals have lower energy than p orbitals which ...
- 187
0
votes
1
answer
1k
views
Why does ionisation energy to remove electrons from the same subshell increases? [closed]
Electrons in the same subshell possesses the same energy.
So why does ionisation energy to remove electrons from the same subshell increases?
For example, $\mathrm{2s^2}$ has two electrons. Since ...
- 11
1
vote
2
answers
150
views
Can there be any substance whose number of electrons and protons are different at neutral state
I want to ask that if there any substance that has the different number of electrons and protons at its neutral state
- 37
-1
votes
1
answer
38
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Atoms in Solar Cells
An electric field in solar cells is created through photons knocking electrons off of atoms. What happens to the positively charged atoms once the electrons have been knocked off? Furthermore, are the ...
0
votes
2
answers
720
views
Why do atoms have electron Affinity? [duplicate]
Atoms are stable so how can they pull electrons i.e how do they have any electron affinity at all?
2
votes
0
answers
97
views
As an atom get's bigger (on increasing atomic no.) , electrons have to move faster and faster around the nucleus, Why?
Does speed even make sense at such small scales ? Heisenbergs Uncertainty principle ?
- 423
1
vote
0
answers
80
views
Why do objects gain electrons? [duplicate]
I have read that objects gain electrons to become negatively charged and also that they lose electrons to become positively charged. I have also read that same charges repel each other and non-same ...
- 119