Arrangement of electrons - 1 | Quantum Theory and Atomic Structure

Shell

Possible Subshells

Number of Orbitals in Subshell

Number of e^- in Subshell

Number of e^- in Shell

n = 1

1s (l = 0)

1 (m_l = 0)

1 x 2 (m_s = -1/2, +1/2)

2

n = 2

2s (l = 0)
2p (l = 1)

1 (m_l = 0)
3 (m_l = -1, 0, 1)

2
3 x 2 =6

8

n = 3

3s (l = 0)
3p (l = 1)
3d (l = 2)

1 (m_l = 0)
3 (m_l = -1, 0, 1)
5 (m_l = -2, -1, 0, 1, 2)

2
6
10

18

n = 4

4s (l = 0)
4p (l = 1)
4d (l = 2)
4f (l = 3)

1 (m_l = 0)
3 (m_l = -1, 0, 1)
5 (m_l = -2, -1, 0, 1, 2)
7 (m_l = -3, -2, -1, 0, 1, 2, 3)

2
6
10
14

32