All Questions
14
questions
0
votes
1
answer
138
views
Mg2+ ion formation [duplicate]
Why does Mg not form a Mg+1 ion, even though its second ionization energy is much higher than the first ionization energy?
(I know that an ion should resemble the noble gas closest to the element from ...
- 77
1
vote
3
answers
146
views
Comparing Succesive Ionisation Energies
I am trying to understand successive ionisation energies. In particular, an explanation for why the second ionisation energy is greater than the first ionisation energy. I'm looking for a clear and ...
-1
votes
1
answer
65
views
when would copper material have free electrons [closed]
If you imagine a wire of copper(note that I am not talking about electricity at all). Just only a wire of copper or copper metal or whatever full of copper atoms.
We know that each copper atom has 1 ...
- 119
-5
votes
1
answer
74
views
What is the energy difference between inner subshells?
For exemple, in silver the energy difference between the 4d 5s subshells is ≈ 4 eV (in the ultraviolet region, that's why it has no color, etc.), but what is the energy difference between some of its ...
-3
votes
1
answer
533
views
What does it mean when we say an atom has infinite energy levels/shells? [closed]
My chemistry teacher told that an atom has infinite energy shells according to Bohr model , where electron reside according to its angular momentum and energy.
But in lower classes/ grades I have ...
1
vote
0
answers
68
views
What happens inside the orbital when energy provided to electron is not sufficient for it to change orbitals? [closed]
While studying the chapter called Atomic Structure, we were introduced with Bohr's model of an Atom. Even though not all of his postulates were right, I believe some were. A doubt arose in the ...
- 101
16
votes
4
answers
5k
views
Why do electrons jump back after absorbing energy and moving to a higher energy level?
Electrons in a shell absorb energy and move to higher energy levels, but they release their energy and jump back to the shell they originally were in. Why do they jump back? Why can they not keep ...
- 189
-1
votes
1
answer
38
views
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 ...
3
votes
1
answer
1k
views
Energy levels in non-hydrogen-like atoms
The energy $E_n$ for a hydrogen like atom is given as
$$E_n = -hcR_\ce{H}\frac{Z^2}{n^2}$$
However, aside from on wikipedia where there is
$$E_n = -hcR\frac{Z_\text{eff}^2}{n^2},$$
I can't find ...
- 143
4
votes
0
answers
234
views
Difference between change in energy level and hyperfine energy level?
The second is the duration of 9 192 631 770 periods of the radiation
corresponding to the transition between the two hyperfine levels of the
ground state of the cesium 133 atom.
--> This ...
- 383
2
votes
1
answer
77
views
Electron's Energy In The Atom
I know that the exact (OK most of the times not the exact) energy of an electron can be calculated by solving Schrodinger's differential equation, but can we explain an electron's energy of a specific ...
- 21
2
votes
0
answers
301
views
First ionization energy of hydrogen molecule
If we have the dissociation's energies of hydrogen molecule $\ce{H_{2}}$($D_{0}$) and the corresponding molecule ion $\ce{H_{2}^{+}}$ ($D_{1}$) together with the first energy of ionization of hydrogen ...
- 21
3
votes
3
answers
6k
views
In nuclear chemistry, how does a neutron split to form a proton and an electron?
I'm studying radioisotopes at the moment and balancing nuclear reactions isn't making sense in that more matter is coming out of the equation in negative β⁻ decay equations:
$$\ce{_6^{14}C -> _7^{...
- 33
5
votes
2
answers
814
views
Energy of the n-th level for an atom
Going through the Bohr's model and his assumptions, I came across with this formula to find the energy of the n-th level of any atom:
$$E = - \frac{Z k_e e^2}{2r_n} = -\frac{Z^2(k_e e^2)^2m_e}{2\...
- 325