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An orbital is a one-electron wavefunction, usually derived by solving the Schrodinger equation. This tag applies to questions about all forms of orbitals; additionally, questions about the construction and properties of molecular orbitals should be tagged with [molecular-orbital-theory].

3 votes

Energy levels in an atom

However, in bonding, d orbitals will not be involved in the ground state bonding orbital of a molecule if there are not enough electrons and not enough energy to initially fill the d atomic orbitals. … As soon as there are enough electrons, as in transition metal complexes, d orbitals become essential to understanding bonding. Note: (I'm ignoring ideas such as hybridisation between orbitals) …
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2 votes

Why is the radial distribution at the nucleus 0 but not the radial wave function?

For other orbitals, e.g $2p_{\pm 1}$ the wavefunction is a function with complex numbers so cannot represent anything physical. …
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1 vote

Can the regions of 1s and 2s subshells overlap?

(If orbitals are on different atoms, the wavefunctions now have to be represented with respect to a common set of coordinates, i.e. the equations for orbitals, say, on atoms A and B, must use the same …
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5 votes

Why do different orbitals have different shapes?

To be able to draw these, and to make chemical sense, we have to combine them together so that they are no longer complex numbers, and this is what is done to form the p orbitals etc. …
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8 votes

What are angular and radial nodes?

In forming bonds from atomic orbitals the parity of the wavefunction is important. … Anti-bonding orbitals always have nodes. Nodal planes are also important in Diels Alder addition and similar reactions as here symmetry is important. …
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10 votes

What are overlap integrals?

As the atomic orbitals are normalised the maximum overlap is 1 and minimum zero. The overlap only contains contributions from regions of space where where the atomic orbitals are not zero. … Note, however, if the atomic orbitals are orthogonal to one another the overlap integral is zero at all distances. …
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1 vote
Accepted

How does H's ionization energy relate to its transition energy (Bohr's Model)?

The visible transitions in the $\ce{H}$ atom were observed experimentally to follow the equation $$\overline{\nu} = R_H\left(\frac{1}{n_1^2} - \frac{1}{n_2^2}\right)$$ where $R_\ce{H}$ is the Rydbe …
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2 votes

What is the symmetry of dxy orbital?

Imagine that the $x$ axis and $y$ axis lobes have a different color (phase). Locate the principal axis, that of highest rotational symmetry, if there is more than one just choose one. A $C_2$ or 180 …
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1 vote

Octahedral Crystal Field Splitting Orbital Energy Levels

The total energy of the d orbitals before and after the application of the octahedral (cubic) field has to be the same. As three levels fall and two rise, the ratio is as shown. …
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3 votes

Octahedral Crystal Field Splitting Orbital Degeneracy

This happens because the $z$-axis ligand has more effect on $\mathrm d_{z^2}$ than on $\mathrm d_{x^2-y^2}$ orbitals simply due to its position. …
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3 votes

What does oscillator strength have to do with state character?

This does not seem to make any sense to me either unless I'm missing something very obvious. Suffice it to say that spin changing transitions are generally strongly forbidden, unless paramagnetic elec …
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4 votes
Accepted

Transition from ground state to excited state

First you need to have the ground state electron configuration, for Neon this is 1s$^2$2s$^2$2p$^6$ or what ever it is for your atom. This will give you the term symbol for the ground state. The excit …
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12 votes
Accepted

Basics of wave-mechanical model of atom

These orbitals represent the angular part of the wavefunction. … The other orbitals are also linear combinations e.g. …
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2 votes

Does an electron's spin change when being excited?

The picture shows a triplet excited state returning to the ground state by emitting a photon, i.e. phosphorescence. This can only happen if there is also an interaction that couples angular momentum c …
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2 votes

Can two wavefunctions of 1s electrons in He atom have opposite phase?

You can only do what you suggest (make product) if the electrostatic repulsion between the two electrons is ignored. This means that there are two single electron equations (just as for hydrogen but w …
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