Why each element gives off its own colors
Grade 10 Science Worksheet - Challenge Me
Circle the best answer, or write your answer on the line.
With 1/λ = R(1/2² − 1/n²) and R = 1.0973731568 × 10⁷ m⁻¹ (CODATA), what wavelength does hydrogen give off for n = 3 → 2, to 0.01 nm, Ari?
Using the table, a sample shows lines at 486.1, 589.0, 589.6 and 656.3 nm. What does it hold, Jun?
- Sodium alone
- Hydrogen and sodium
- Helium with no hydrogen
Using the table, a sample shows one line at 447.1 nm and none at 501.6 nm. Is it surely helium, Kira?
Use the picture in question 2.
- Yes: lines can be skipped
- Yes: one match is enough to be sure
- No: helium's 501.6 line is missing
Using the table, a sample shows 434.0, 447.1, 486.1, 501.6 and 656.3 nm. What does it hold, Luz?
Use the picture in question 2.
- Hydrogen alone
- Hydrogen and helium
- Sodium mixed with helium
Milo says glowing hydrogen gives off every color of the rainbow. Agree or disagree?
- Agree: hot gases glow every color
- Agree: glowing light holds each color
- Disagree: only a few set lines
Noah says two different elements can't share the exact same full set of lines. Agree or disagree?
- Disagree: lines are random
- Agree: each pattern is unique
- Disagree: gases look alike when glowing
Pia says an electron slides slowly down between levels, giving off a smear of color. Agree or disagree?
- Agree: electrons slide smoothly downward
- Agree: drops take hours
- Disagree: it jumps between set levels
What does it mean that an electron's energy is quantized, Ren?
- It stays at zero
- It can only have set values
- It can have any value
Why is an energy-level diagram drawn as a ladder rather than a ramp, Tala?
- Only set levels are allowed
- Electrons climb with their feet
- Ladders are easier to draw
Can hydrogen at n = 1 absorb a 5 eV photon (levels −13.6, −3.40, −1.51 eV), Zee?
- No: 5 eV fits no gap
- Yes: any photon is absorbed
- Yes: it jumps halfway