Nomenclature of Atom States

Multiplicity (Spin S ≥ 0) ¯ |  | Total kinetic moment ¯
2S + 1 | L | J
Orbital moment L = 0, 1, 2, 3, 4... S, P, D, F, G |

Examples:

2D5/2 | it's said: doublet D five second
the state with S = 1/2, L = 2 and J = 5/2
6H13/2 | it's said: sextet H thirteen second
the state with S = 5/2, L = 5 and J = 13/2
1S0 | it's said: singlet S zero
the state with S = 0, L = 0 and J = 0

The kinetic moments S = 1 and L = 1 can principally give total kinetic moments J = 0, 1, 2. The possible states are then the following ones:

3P0, 3P1, 3P2