Subjects

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Electron Configuration | 27 mins | 0 completed | Learn Summary |

Paramagnetic and Diamagnetic | 10 mins | 0 completed | Learn Summary |

Effective Nuclear Charge | 25 mins | 0 completed | Learn |

The Spin Quantum Number | 9 mins | 0 completed | Learn |

Orbital Shapes | 5 mins | 0 completed | Learn Summary |

Periodic Trends: Atomic Radius | 4 mins | 0 completed | Learn |

Periodic Trends: Ionic Radius | 6 mins | 0 completed | Learn Summary |

Periodic Trends: Ionization Energy | 20 mins | 0 completed | Learn Summary |

Periodic Trends: Electron Affinity | 12 mins | 0 completed | Learn Summary |

Additional Practice |
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Orbital Diagrams |

Coulomb's Law |

Quantum Numbers |

Periodic Trends |

Periodic Trends: Metallic Character |

Additional Guides |
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Atomic Radius |

Ionization Energy |

The fourth quantum number, m_{s}, determines the spin of an electron within an atomic orbital.

Whereas the first 3 quantum numbers describe the atomic orbital where you find the electron, the final quantum number, m_{s}, describes spin the electron possesses.

The **Pauli Exclusion Principle** implies that two electrons in the same atomic orbital cannot spin in the same direction so as to avoid having the same four quantum numbers.

Example #1: State the electron configuration of boron and list the four quantum numbers of the 1** ^{st}** and the 5

0 of 3 completed

Concept #1: Spin Quantum Number Part 1

Concept #2: Spin Quantum Number Part 2

Example #1: Spin Quantum Number

How many of the following statements are false?I. The principal quantum number n is related to the size of an orbital.II. s, p, d, f represent orbitals with different azimuthal quantum numbers.III. The magnetic quantum number can have values of +½ or -½.IV. The spin quantum number is related to the orientation of an orbital.V. The electron density at a point is proportional to Ψ 2 at that point.A. 0B. 1C. 2D. 3E. 4

Which one of the following statements is false?a. If an electron quantum number n=2, it may be a p sublevel.b. If an electron has ℓ=1, it must be in a p sublevel.c. Two electrons in the same atom may have quantum numbers, n , l , mℓ , ms of 2,1,-1,½, and 2,-1,- 1,½.d. Two electrons in the same atom may not have quantum numbers of 2,1,-1,-½ and 2,1,-1,-½.e. If an electron has n=1, it must be in an s orbital

Fluorine can gain an electron to become fluoride (F−). What is the quantum number (following the numbering conventions) that describes the electron that was gained by fluorine.(a) n = 2, ℓ = 0, m ℓ = 1, ms = -1⁄2(b) n = 2, ℓ = 1, m ℓ = 0, ms = -1⁄2(c) n = 3, ℓ = 1, m ℓ = 1, ms = +1⁄2(d) n = 2, ℓ = 1, m ℓ = 1, ms = -1⁄2(e) n = 2, ℓ = 1, m ℓ = -1, ms = -1⁄2

For an electron that has quantum numbers n = 3 and m l = 2, which of the following is true?A) it must have the quantum number m s = + 1/2B) it must have the quantum number l = 1C) it may have the quantum numbers, l = 0, 1, 2D) it must have the quantum number l = 2E) none of these answers apply to this electron

Which of the following represents an impossible set of quantum numbers for an electron in an atom?a. 2, 1, -1, -1/2 b. 1, 0, 0, +1/2c. 3, 3, 3, +1/2 d. 5, 4, -3, +1/2 e. 5, 4, -3, -1/2

Which one of the following represents a 2p electron in an atom?a. 2, 1, -1, +1/2b. 2, 1, 0, 0c. 2, 2, 0, -1/2d. 2, 0, 1, -1/2 e. 2, 0, 2, +1/2

How many electrons can have the following quantum numbersa) n=3, l=1, ms=1/2 b) n=4, m l = -1

Which of the following set is an acceptable set of quantum numbers? a. n = 0, l = 0, m l = 0, m s = +1/2b. n = 2, l = 1, m l = 2, m s = −1/2c. n = 2, l = 0, m l = 0, m s = 1d. n = 1, l = 1, m l = 0, m s = −1/2e. n = 3, l = 1, m l = −1, m s = −1/2

Which of the following sets of the four quantum numbers n, l, m l, and ms decribes one of the outermost electrons in a ground-state barium atom?a) 6, 1, 1, ½b) 6, 0, 1, -½c) 6, 0, 0, -½d) 6, 1, 0, ½e) 6, 2, 1, -½

Which set of quantum numbers is not possible?a) n = 2, l = 1, m l, = +1, m s = –1/2b) n = 3, l = 2, m l = +1, m s = +1/2c) n = 4, l = 4, m l = –1, m s = +1/2d) n = 5, l = 2, m l = 2, m s = –1/2

Which set of quantum numbers is correct and consistent with n = 4?(A) l = 3 m l = -3 ms = +1/2(B) l = 4 m l = +2 ms = -1/2(C) l = 2 m l = +3 ms = +1/2(D) l = 3 m l = -3 ms = +1

How many electrons can have the following quantum sets? a. In the 7 th shell of an atom (n = 7)b. n = 5, ℓ = 2c. n = 6, ℓ = 3, m ℓ = -2d. n = 4, ℓ = 2, m ℓ = 0 , m s = -1/2e. n = 4, m ℓ = -1f. n = 5, m ℓ = 0 , m s = 1/2g. n = 9, ℓ = 4, m s = -1/2h. n = 2, m s = 1/2

Each of the following sets of quantum numbers gives information on a specific orbital. Find the error in each. a) n = 4, l = 0 , m l = 1, m s = -1/2b) n = 5, l = 2 , m l = - 1, m s = 1c) n = 7, l = 7, m l = - 5, m s = -1/2d) n = 22, l = 5, m l = - 6, m s = 1/2

Which of the following represents a set of quantum number for valence electron of Chlorine?A. (3,1,0,-1)B. (3, 2, 0, -1/2)C. (3,0,2, 1/2)D. (3,1,-1, -1/2)E. (3,1,0,0)

What is the smallest acceptable value for the missing quantum number?n = ?, ℓ = 2, mℓ = 0, ms = +1/2A) 4B) 3C) 1D) 5E) 2

Which of the following is not a permitted combination of quantum numbers?1. n = 4, ℓ = 2, mℓ = 1, m s = 1/22. n = 3, ℓ = 0, mℓ = 0, m s = 1/23. n = 4, ℓ = 3, mℓ = 3, m s = − 1/24. n = 2, ℓ = 1, mℓ = −2, m s = 1/25. n = 3, ℓ = 0, mℓ = 0, m s = − 1/2

Which of the following set of quantum numbers (ordered n, ℓ, m ℓ, ms) are possible for an electron in an atom? Check all that apply.a. 5, 3, 0, 1/2b. 2, 1, 0, 1/2c. 3, 1, 0, -1/2d. 2, 1, 0, 1e. 2, 1, -2, 1/2f. 3, 4, 0, 1/2g. 5, 3, 4, 1/2h. -1, 0, 0, -1/2

Which of the following set of quantum numbers (ordered n,l,ml,ms) are possible for an electron in an atom? Check all that apply.a. 3, 4, 0, 1/2b. 3, 2, 0, -1/2c. 3, 2, 2, -1/2d. 3, 1, 0, -1/2e. -3, 2, 2, -1/2f. 4, 3, 4, -1/2g. 2, 1, 0, 1h. 2, 1, -2, 1/2

Identify the orbital represented by the quantum numbers given below:n = 3 l = 1 m l = 0 m s = -1/2 Now select the electron represented by the quantum numbers.

Find all four quantum numbers (n, l, ml, and ms) for the selected electron below. Select the correct answer for each quantum number.

Which of the following is a possible set of quantum numbers for a 3d electron?a) n=4, l=3, m l=2, ms=-1/2 b) n=3, l=2, m l=0, ms=-1/2c) n=3, l=1, m l=1, ms=+1/2d) n=3, l=3, m l=2, ms=+1/2e) n=3, l=0, m l=0, ms=+1/2

Which of the following is a possible set of quantum numbers?

Identify which sets of quantum numbers are valid for an electron. Each set is ordered(n,l,ml,ms). Select all that apply.3,0, 0,1/20,2,1,-1/23,2,2,1/22,1,0,1/24,3,5,-1/23,1,-1,1/22,2,-1,1/24,3,1,-1/22,2,1,-1/21,-1,-1,-1/23,3,1,1/23,-2,-1,0

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