the spectral line of longest wavelength in the bracket series of hydrogen spectrum corresponds to the electronic transition between the orbits is?

Alkaline Earth Metals are the 2nd Group of Metals on the Periodic Table.

Explanation:

Characteristics:

- Shiny

- Reactive

- Low melting and boiling points

- Low density

- 2 valence electrons

Alkaline Earth Metals cannot be found alone in nature since they are highly reactable (If you've ever thrown barium into a lake, it would cause a massive explosion).