Scientific Understanding

**What sections should I know before attempting to learn this section?**

—> Complete Electron Configuration **Part 3**

—> Quantum NumbersĀ **Part 1 (n)**

**What does the L stand for in quantum numbers?**

The next quantum number category L stands for the type of orbitals. In electron configurations the types of orbitals were the s, p, d, f orbitals that were discussed in the orbitals section of this lesson. In the quantum numbers if L = 0 represents the s orbitals. If L = 1 represents the p orbitals. If L = 2 represents the d orbitals. If L = 3 represents the f orbitals. Another way to represent that is the table below.

L = | Orbital types |

0 —> | s |

1 —> | p |

2 —> | d |

3 —> | f |

You can also see how this is represented on the quantum periodic table with this link.

**Examples**: Give the L (orbital type) of the last electron in each element.

Be | L = 0 |

Pd | L = 2 |

Al | L = 1 |

**PRACTICE PROBLEMS**: Give the L (orbital type) of the last electron in each element.

P | L = 1 |

Co | L = 2 |

Sn | L = 1 |

Ba | L = 0 |

Th | L = 3 |

W | L = 2 |