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# 1 Practice MCAT # 11

### Things I learned from taking the practice MCAT # 11 Test

Question | Answer |
---|---|

What does the angular momentum quantum number, L, dictates? | The angular momentum quantum number, L, is the quantum number that dictates the "shape" of an electron orbital. |

The angular momentum number L is the same as the number of angular ..... ? | It is the same as the number of angular NODES (also known as the regions of zero probability) present in the electron orbital. |

What is the name of the first, or principle, quantum number in general chemistry? What is the designated letter for this quantum number? | The first, or principle, quantum number is called the shell number. The designated letter for the first quantum number is N. |

What does the first, or principle, electron quantum number tell us about the atom? | The shell number, n, is the electron quantum number that tells us the SIZE & ENERGY of an electron orbital. Loosely speaking, an orbital describes a three dimensional region around the nucleus in which the electron is most likely to be found. |

What can be the possible values of the first, or principle, electron quantum number? | The values of the shell number, n, can be any whole number starting with 1. Note; the greater the value of n, the greater the electron's energy and average distance from the nucleus. |

What is the name of the second quantum number in general chemistry? What is the designated letter for this quantum number? | The second quantum number is called the subshell number, and it is denoted by the letter L. |

What does the second electron quantum number tell us about the atom? | The second quantum number, the subshell number, describes the SHAPE (and energy) of an electron's orbital. |

What can be the possible values of the first, or principle, electron quantum number? |