Question

c. The Lyman-a hydrogen solar emission line at 121.58 nm corresponds to an elec- tron dropping from a higher energy level down to n = 1. Use the Rydberg equa- tion to identify the transition. to = 1 5. Colorful lights used in advertising are commonly referred to as "neon lights." If these lights act like large gas discharge tubes, do all "neon lights" contain neon? Explain. 6. A fireworks display is based on the same principles as flame tests, only on a much larger scale. Based on your experimental observations in part C, which elements are suitable for the following for colors for fireworks? a.yellow-orange b. red-orange c. violet d. magenta e. bright red f. green

Answer 1

Answer c)

Answer C) f = 109678 (more nuntia) em! 1090 nimira = 121.58nm - 121.58 x 10 cm final - 1 - 109678 (te rrinitial) ant 121.58 xloem 82250.37 con = 109678 (1 - 1 1 initial) ant 82250.37 - 109678 = - 109678 ninitial 427427.63 - 1109678 ne initial = 3.99 n'initial = 109678 27497.63 Ninitial - 13.99 ~ [2]

Answer 5)

No all neon lights do not contain Neon. Gases such as Ne, Ar, Kr, He and Xe is present.

It is so because light of all colors cannot be emitted from Neon atoms. Usually neon filled lights give red glow. Other colors such as blue, yellow, green etc. are by the lights filled with Argon.