How many orbitals are there in the second orbit? How are they designated?

How many electrons are there in the outermost orbit of carbon?

How many sub-shells are there in N-shell?How many orbitals are there in d-subshells?

What will be the angular momentum in fourth orbit if L is the angular momentum of the electron in the second orbit of hydrogen atom ?

For an electron in the second orbit of Bohr Hydrogen atom, the moment of linear momentum is

The total energy of an electron revolving in the second orbit of hydrogen atom is

The energy of an electron in the second Bohr orbit of H-atomis -E. The enrgy of the electron in the Bohr's first orbit is