# quantum

1. ### Quantum number at n=3 and l=2

Hello, From my understand, at n=3, it is possible to have l=2 (since the maximum l is n-1). However, at n=3, it think it is impossible to have l=2, since that is the d orbital, which only exists from n=4. Can someone explain this to me? It would be great if you can give an element that fits that...
2. ### Quantum Numbers

For the element Nickel, how many ground state electrons will have the quantum numbers n=3 and m(l)= -1? Here's what I did but I'm not sure if I'm right: So for n=3 (Nickel), there are 16 electrons in the ground state (yes?). and then to find the magnetic quantum number, I must first find l...
3. ### Classical physics vs Quantum Mechanics....Need help solving question

Classical physics is________. This means that the motions of observed objects can be known ________. Quantum mechanics is_______. The motions within a system are described based upon ________. This is consistent with the Heisenberg Uncertainty Principle, which states that the more that is known...
4. ### Quantum Mechanics

In the derivation of the atomic orbitals, how can a normalized differential wave equation be represented in a spherical coordinate system?
5. ### best relativistic quantum chemistry software?

Hi dear friends What is the best relativistic quantum chemistry software? I want to calculate relativistic properties of heavy atoms. I know Dirac and Gaussian softwares in this field ,but I don't perform any relativistic calculation with those. Please help me!:confused:
6. ### Why do chemist need to learn about quantum numbers?

I have just finished learning about quantum numbers. What I would like to know is why chemistry students need to learn to assign quantum numbers? They do not appear useful. I know that the numbers tell you about the energy, shape, magnetism, and spin of an electron but, why does a chemist...
7. ### quantum numbers

What is the element whose last electron in has the following set of quantum numbers? n = 4 l = 3 ml = -2 ms = +1/2 i do not understand how to do this question, can you please explain how i would do a question like this. thank you.
8. ### Quantum Theory: Determining the delta E and wavelength of an Electron Transition

Hi, In my chemistry textbook, there is one example of a question where an electron jumps from one energy level to another, and they ask you to calculate the change in energy and the wavelength of the photon. The sample question explains that you use Bohr's equation first to find delta E (Delta...
9. ### Quantum Numbers

Just a quick multiple choice question Which of the following statements about an electron with angular momentum quantum number l=3 is INCORRECT? A The electron canot be in the lowest energy shell B The electron may have a magnetic quantum number of ml= 3 C The electron may have spin ms= + 1/2...