1. Spectroscopy of Various Metals
CHEMISTRY
PROCEDURE
Obtained spectral lines by burning metals with a butane torch.
Electrons in the metals are excited by the heat and then fall back to a lower energy level, emitting a photon.
Photons dispersed by a grating and detected by the CCD to give a spectrum
Mg +½O2 → MgO heat
Mg + heat → Mg*(g)→ Mg(g)+ n
LiCl(s) → Li+(g) + e → Li*(g) → Li(g)+ n
NaCl(s) → Na+(g) + e → Na*(g) → Na(g)+ n
RESULTS
Magnesium
Most interesting spectrum & burned bright white
Blackbody & sharp peaks.
Peaks from electronic transitions
LiCl
Beautiful crimson
Sharp line at ~670 nm
Did not ignite, just excited by the flame
NaCl
orange-red color
Sharp line ~590 nm Na doublet)
Did not ignite, just excited by the flame