11. Unknown Gas #3 (circle correct answer): Hydrogen, Helium, Mercury, Sodium, Neon, or Krypton 8000- 7000 6000 - 5000 - 4000 3000 - 2000- 1000- -100 -50 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 Nanometers 1 2 3 Line 1: nm Line 2: nm Line 3: nm Line 4: nm 12. Unknown Gas #