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From Wikipedia here and here:

''Almost all molecules encountered in daily life exist in a singlet state, but molecular oxygen is an exception.''

''The unusual electron configuration prevents molecular oxygen from reacting directly with many other molecules, which are often in the singlet state. Triplet oxygen will, however, readily react with molecules in a doublet state, such as radicals, to form a new radical. ''

This wiki page is also relevant. Here is a picture (which I can't read).

How is this triplet state property quantitatively computed and why is it such an exceptional feature?

How does the triplet state come about in oxygen? Don't more electrons in electron shell mean more complicated factoring into representations and therefore even more complicated states?

How does that impact the thermodynamical properties of the element and where is the thermodynamical difference to the singlet state? How can the reaction features be understood?

Where does the energy difference of the two state come from. Taking a look at the periodic table of elements, has $\text S$ or $\text {Se}$ similar properties?

Btw. I don't mind any math, but I'd probably need explanations for expressions like $\text O_2(b^1\Sigma_g^{+})$.

From Wikipedia here and here:

''Almost all molecules encountered in daily life exist in a singlet state, but molecular oxygen is an exception.''

''The unusual electron configuration prevents molecular oxygen from reacting directly with many other molecules, which are often in the singlet state. Triplet oxygen will, however, readily react with molecules in a doublet state, such as radicals, to form a new radical. ''

This wiki page is also relevant. Here is a picture (which I can't read).

How is this triplet state property quantitatively computed and why is it such an exceptional feature?

How does the triplet state come about in oxygen? Don't more electrons in electron shell mean more complicated factoring into representations and therefore even more complicated states?

How does that impact the thermodynamical properties of the element and where is the thermodynamical difference (besides the different energy) to the singlet state? How can the reaction features be understood?

Where does the energy difference of the two state come from. Taking a look at the periodic table of elements, has $\text S$ or $\text {Se}$ similar properties?

Btw. I don't mind any math, but I'd probably need explanations for expressions like $\text O_2(b^1\Sigma_g^{+})$.

From Wikipedia here and here:

''Almost all molecules encountered in daily life exist in a singlet state, but molecular oxygen is an exception.''

''The unusual electron configuration prevents molecular oxygen from reacting directly with many other molecules, which are often in the singlet state. Triplet oxygen will, however, readily react with molecules in a doublet state, such as radicals, to form a new radical. ''

This wiki page is also relevant.

How is this triplet state property quantitatively computed and why is it such an exceptional feature?

How does the triplet state come about in oxygen? Don't more electrons in electron shell mean more complicated factoring into representations and therefore even more complicated states?

How does that impact the thermodynamical properties of the element and where is the thermodynamical difference to the singlet state? How can the reaction features be understood?

Where does the energy difference of the two state come from. Taking a look at the periodic table of elements, has $\text S$ or $\text {Se}$ similar properties?

Btw. I don't mind any math, but I'd probably need explanations for expressions like $\text O_2(b^1\Sigma_g^{+})$.

From Wikipedia here and here:

''Almost all molecules encountered in daily life exist in a singlet state, but molecular oxygen is an exception.''

''The unusual electron configuration prevents molecular oxygen from reacting directly with many other molecules, which are often in the singlet state. Triplet oxygen will, however, readily react with molecules in a doublet state, such as radicals, to form a new radical. ''

This wiki page is also relevant. Here is a picture (which I can't read).

How is this triplet state property quantitatively computed and why is it such an exceptional feature?

How does the triplet state come about in oxygen? Don't more electrons in electron shell mean more complicated factoring into representations and therefore even more complicated states?

How does that impact the thermodynamical properties of the element and where is the thermodynamical difference to the singlet state? How can the reaction features be understood?

Where does the energy difference of the two state come from. Taking a look at the periodic table of elements, has $\text S$ or $\text {Se}$ similar properties?

Btw. I don't mind any math, but I'd probably need explanations for expressions like $\text O_2(b^1\Sigma_g^{+})$.

From Wikipedia here and here:

''Almost all molecules encountered in daily life exist in a singlet state, but molecular oxygen is an exception.''

''The unusual electron configuration prevents molecular oxygen from reacting directly with many other molecules, which are often in the singlet state. Triplet oxygen will, however, readily react with molecules in a doublet state, such as radicals, to form a new radical. ''

How is this triplet state property quantitatively computed and why is it such an exceptional feature?

How does the triplet state come about in oxygen? Don't more electrons in electron shell mean more complicated factoring into representations and therefore even more complicated states?

How does that impact the thermodynamical properties of the element and where is the thermodynamical difference to the singlet state? How can the reaction features be understood?

Where does the energy difference of the two state come from. Taking a look at the periodic table of elements, has $\text S$ or $\text {Se}$ similar properties?

Btw. I don't mind any math, but I'd probably need explanations for expressions like $\text O_2(b^1\Sigma_g^{+})$.

From Wikipedia here and here:

''Almost all molecules encountered in daily life exist in a singlet state, but molecular oxygen is an exception.''

''The unusual electron configuration prevents molecular oxygen from reacting directly with many other molecules, which are often in the singlet state. Triplet oxygen will, however, readily react with molecules in a doublet state, such as radicals, to form a new radical. ''

This wiki page is also relevant.

How is this triplet state property quantitatively computed and why is it such an exceptional feature?

How does the triplet state come about in oxygen? Don't more electrons in electron shell mean more complicated factoring into representations and therefore even more complicated states?

How does that impact the thermodynamical properties of the element and where is the thermodynamical difference to the singlet state? How can the reaction features be understood?

Where does the energy difference of the two state come from. Taking a look at the periodic table of elements, has $\text S$ or $\text {Se}$ similar properties?

Btw. I don't mind any math, but I'd probably need explanations for expressions like $\text O_2(b^1\Sigma_g^{+})$.