Orbitals, shells, subshells, oh my

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Understanding orbitals, shells, subshells, and electron configuration can be challenging for many learners. Users in the discussion seek reliable resources to clarify these concepts, expressing frustration with the quality of available information. Several websites are recommended, including Purdue University's chemistry page and various educational sites from Florida State University and Fordham Prep. Caution is advised when using Wikipedia due to quality issues, and cross-referencing is encouraged. Overall, the discussion emphasizes the need for clear, accessible explanations of atomic structure based on quantum mechanics.
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I'm having trouble understanding anything dealing with the subject of orbitals, shells, subshells, electron configuration, etc. I'm sure no one on this site is going to want to explain it to me in full or anything like that; I'm not expecting it. Can anyone suggest a website that explains this subject matter? I'll continue looking myself but I'm not finding anything that great. So any help or suggestions would be much appreciated.
 
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id suggest just typing in atomic structure in google...and make sure its the one defined by quantum mechanics
 
or just go with Astronuc's sites, lol:P
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
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Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
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