10th grade Why each element gives off its own colors worksheet

Why each element gives off its own colors

Grade 10 Science Worksheet

Circle the best answer, or write your answer on the line.

1. 1.

   A hydrogen photon carries 1.89 eV. With hc = 1239.84 eV·nm, what is its wavelength, to 0.01 nm, Ari?
2. 2.

   A hydrogen photon carries 2.55 eV. With hc = 1239.84 eV·nm, what is its wavelength, to 0.01 nm, Bo?
3. 3.

   A hydrogen photon carries 2.86 eV. With hc = 1239.84 eV·nm, what is its wavelength, to 0.01 nm, Esme?
5. 4.

   Using the table, which element is the unknown gas, Jun?

   • Hydrogen
   • Sodium vapor
   • Helium
6. 5.

   Using the table, what is special about sodium's lines, Kira?

   Use the picture in question 4.

   • Two lines very close together
   • No visible lines
   • Lines spread across the colors
7. 6.

   Using the table, which hydrogen line is reddest, Luz?

   Use the picture in question 4.

   • 410.2 nm
   • 656.3 nm
   • 486.1 nm
8. 7.

   Starlight passes through cool hydrogen. Where do dark lines appear, Milo?

   • At hydrogen's own wavelengths
   • Spread across the whole spectrum
   • At random wavelengths
9. 8.

   What happens when an atom absorbs a photon of the right energy, Noah?

   • An electron jumps up a level
   • An electron drops down a level
   • The nucleus splits
10. 9.

    Which drop gives a bluer line: a big one or a small one, Ren?

    • A small one
    • A big one
    • Both give the same color
11. 10.

    Drops to n = 1 in hydrogen give photons of 10 eV or more. What kind of light is that, Zee?

    • Infrared heat
    • Ultraviolet
    • Red