All Questions
109
questions
-3
votes
2
answers
144
views
Why does atomic radius decrease across periods? [closed]
My textbook says that this happens because the number of protons, and thus the total positive charge, increases - a greater attractive force acts on each electron. The book says that this is despite ...
- 63
0
votes
0
answers
60
views
The first electron affinity of an atom
I've read that the first electron affinity is always negative, meaning that energy is always released upon the addition of this first electron. However, I don't think this will apply to noble gases. ...
-2
votes
1
answer
80
views
If you give an electron in a subshell more energy, does it simply "jump" to the next energy level?
Suppose you have an electron in the $\ce{2s}$ subshell of an atom. If energy is given to it, does it simply jump to the next energy level (into the $\ce{3s}$ subshell), or does it move into $\ce{2p}$?
- 193
9
votes
1
answer
723
views
Why does the same electron transition release photons of different frequencies for some elements?
Question: For elements in the same period with different numbers of valance electrons, why does the same electron transition release photons of different frequencies?
Example: For valance electrons ...
- 103
-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
-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
1
answer
60
views
What kind of electronic configurations are possible?
Let us take $d^6$ orbital as an example:
A) ↑ | ↑ | ↑ ↓ | ↑ | ↑ |
Now , this one 1 way. My Q is that how is it possible that in the 3rd box , we have a paired electron but not in the 1st one. Like it ...
- 49
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
1
vote
0
answers
361
views
Shielding effect is not constant across a period [closed]
Shielding effect stays constant across a period because number of inner electrons stays the same.
Well, that's not true.
It only works for the period =1,2,3
but in period 4, the number of inner ...
3
votes
3
answers
7k
views
Which atom is the smallest atom?
Is hydrogen or helium the smallest atom? My teacher said that the smallest atom is the helium atom, but I think that the smallest atom is the hydrogen atom. It has a single electron and a single ...
user100905
-5
votes
2
answers
1k
views
What would happen if the alpha particles directly hit the electrons in the gold foil in Rutherford's experiment? [closed]
What would happen if the alpha particles directly hit the electrons in the gold foil in Rutherford's experiment?
Would it get ionized or is there no probability of such a thing happening ?
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 ...
-4
votes
1
answer
1k
views
Is this bond Ionic or Covalent, and why? AlBr [closed]
We know a compound could form between NaCl because they are +1 and -1 ions which make them both into a complete valence set.
Could a compound form between Al and Br, for example, and what type of bond ...
- 17
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