What is the maximum number of electrons in an atom where n=2 and l=2?

Answer 1

Each electron in an atom is described by four different quantum numbers.

1. Principal Quantum Number (n): n = 1, 2, 3, … Specifies the energy of an electron and the size of the orbital (the distance from the nucleus
2. Angular Momentum Quantum Number (l): Specifies the shape of an orbital.  s= 0, p=1; d=2.....
3. Magnetic Quantum Number (m_l):  Specifies the orientation of an orbital of a given energy (n) and shape (l).
4. Spin Quantum Number (m_s): Specifies the orientation of the spin axis of an electron

so n=2 is second energy level; l=2 would be a d orbital

the problem is that the 2nd energy level only has an s and a p orbital (l can be 0 or 1 but not 2 in the 2nd energy level)