Name:______

Electrons in Atoms Test Review

E= energy in J λ= wavelength in m (λ is the Greek letter lambda) f = frequency in Hz or s-1

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 3.44X109MHz? (1MHz = 1X106Hz)

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

3. A radio station broadcasts with a frequency 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 f: 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. Lowerf: 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

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+______

K. Complete the table and write the nuclear symbol for each ion:

Atomic Number / Mass Number / # protons / #neutrons / #electrons / Nuclear Symbol
38 / 53 / 36
16 / 19 / 18
53 / 75 / 54

L. Complete the following mole problems using dimensional analysis:

1. How many ions of chlorine are in 6.0 moles of magnesium chloride, MgCl2?

2. How many lithium ions would 130.6 grams of lithium oxide, Li2O, contain?

3. In a 200. gram sample of calcium nitrate, Ca(NO3)2, how many calcium ions are present?

4. A sample of potassium sulfide, K2S, contains 14.0X1026 ions of potassium. What is the mass in grams of this sample?

5. A sample of lithium oxide, Li2O, contains 16.6X1023 lithium ions. What is the mass in grams of this sample?