 # What is the value of a in the fine structure formula of alkali metal atomic spectrum So what is its calculation formula?

## What is the value of a in the fine structure formula of alkali metal atomic spectrum So what is its calculation formula?

A is called the first Bohr radius. The orbital radius is also quantized, and its size can only be 1 (square of 1), 4 (square of 2) and 9 (square of 3)

### Atoms of the same element form _, Atomic composition of different elements___ Molecules of

The atoms of the same element form (simple molecule), and the atoms of different elements form (compound) molecules

### Atoms with the following structures must belong to alkali metals 1. There is only one electron on the outermost layer 2. The number of electrons in the outermost layer is half of that in the sub outer layer 3. The number of electrons in layer m is 1 / 2 of the number of electrons in layer K 4. The sum of the number of electrons in K and l layers is 1 larger than that in M and N layers I don't think it's right If you know how to do it, please explain why thx./

I think 3 should be right
Because the number of electrons in the k layer is 2
Then the number of electrons in layer m is 1
2 8 1 is sodium

### Atomic structures of alkali metals have something in common

The atomic structure of alkali metals has something in common: the outermost layer of an atom has only one electron

### Similarities and differences in atomic structure of alkali metals? Similarities: difference:

Same: the outermost layer is an idea, volatile
Difference: number of nuclear charges, number of electron layers

### Are the elements with valence electron layer arrangement of NS1 all alkali metal elements correct?

No, so is hydrogen