Quantum Number Worksheet #1 - Georgetown ISD



Name:_____________________________

Let’s Review Electrons in Atoms

E=h ν c= ν λ

E= energy in J c= speed of light 3.00X108 m/s

h = Planck’s constant 6.63X10-34 J · s λ= wavelength in m (λ is the Greek letter lambda)

v = frequency in Hz or s-1 (ν is the Greek letter nu)

A. Solve the following problems using the correct number of significant figures:

1. What is the wavelength, in nm, of a wave having a frequency of 3.44X109 MHz? (1MHz = 1X106Hz)

2. What is the energy of one photon of violet light?

3. A radio station broadcasts with a ( of 94.7 MHz. What is the ( of the broadcast?

|Visible Portion of Electromagnetic Spectrum |

|Representative |Wavelength |Color |

|Wavelength (nm) |Region (nm) |  |

|410 |400-425 |Violet |

|470 |425-480 |Blue |

|490 |480-500 |Blue-Green |

|520 |500-560 |Green |

|565 |560-580 |Yellow-Green |

|580 |580-585 |Yellow |

|600 |585-650 |Orange |

|650 |650-700 |Red |

B. Determine which has the following:

1. Higher λ: orange or green light

2. Lower ν: blue or red light

3. Greater E: IR or UV

4. Greater E: Gamma or X-Rays

5. Shorter λ: FM or AM Radio

6. Higher ν: microwave or UV

7. Lower E: yellow or violet light

8. Lower ν: IR or red light

9. Longer λ: TV Waves or blue light

|Electromagnetic Spectrum | |

|Wavelength |Type of Electromagnetic Radiation |

|5.55 m to 187 m OR (5.55X109 nm to 1.87X1011 nm) |AM Radio |

|0.187 m to 5.55 m OR (1.87X108 nm to 5.55X109 nm) |TV & FM Radio Waves |

|10 mm to 187 mm OR (1X107 nm to 1.87X108 nm) |Microwave |

|750 nm to 1,000,000 nm |Infrared (IR) |

|400 nm to 700 nm |Visible spectrum |

|10 nm to 400 nm |Ultraviolet (UV) |

|Less than 10 nm |X rays |

|Less than 0.001 nm |Gamma (γ) rays |

C. Write the electron configurations for the following elements using orbital notation:

1. Sulfur

2. Silver

3. Tungsten

D. Write the complete electron configuration for the following elements:

1. Krypton

2. Californium

3. Tin

E. Write the noble gas or abbreviated electron configuration for the following elements:

1. Chlorine

2. Nickel

3. Ruthenium

4. Iridium

5. Berkelium

G. Give the four q. n. that describe the location of the last electron of the following:

1. Magnesium_____________________________________________________________________________

2. Arsenic_______________________________________________________________________________

3. Zirconium_____________________________________________________________________________

4. Iodine________________________________________________________________________________

5. Cesium_______________________________________________________________________________

6. Gold__________________________________________________________________________________

7. Cerium_______________________________________________________________________________

8. Uranium______________________________________________________________________________

9. Bohrium______________________________________________________________________________

H. Give the four quantum numbers that describe the location of the following:

1. 3rd electron in C _________________________________________

2. 29th electron in Zn _______________________________________

3. 19th electron in Cr _______________________________________

I. Identify the element whose last electron would have the following four q. n.:

1. 3, 2, -1, -1/2 ___________________________________________________________________________

2. 3, 1, -1, -1/2 ___________________________________________________________________________

3. 3, 2, -2, +1/2 __________________________________________________________________________

4. 4, 2, -1, +1/2 __________________________________________________________________________

5. 5, 2, +1, +1/2 __________________________________________________________________________

6. 6, 1, 0, +1/2 ___________________________________________________________________________

7. 4, 3, 0, -1/2 ___________________________________________________________________________

8. 2, 1, +1, +1/2 __________________________________________________________________________

J. Write the complete electron configuration for the following ions and state if it is an anion or cation:

1. Mg 2+ _________________________________ 2. Ca 2+_________________________________

3. H 1+ _________________________________ 4. H 1-_________________________________

5. S 2- _________________________________ 6. O 2-_________________________________

7. Na 1+ _________________________________ 8. F 1-_________________________________

9. Cl 1- _________________________________ 10. K 1+_________________________________

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