Spectrum of Molybdenum

The flame, are, and spark spectra of molybdenum, which exhibit close similarity to those of chromium, have been the subject of much careful investigation. The most persistent lines are in the more refrangible part of the spectrum. The spark spectra of ammonium molybdate in both acid and alkaline solution have been photographed, with identical results. The lines recorded were as follows:

Wave-length.	Intensity and Persistency.	Wave-length.	Intensity and Persistency.	Wave-length.	Intensity and Persistency.
5570.7	10σ	3176.4	4χ	2863.9	4χ
5533.3	10σ	3175.2	4χ	2853.3	6χ
5506.7	10σ	3173.0	4χ	2848.4	8ψ
4760.4	6φ	3159.4	2σ	2816.3	8ψ
4731.6	4φ	3145.8	4σ	2807.8	6φ
4707.4	4φ	3145.9	2σ	2785.1	4ψ
4381.8	4χ	3141.9	4σ	2780.1	6σ
4244.9	4φ	3141.6	4σ	2775.5	6ω
3903.1	10ψ	3139.0	4σ	2746.4	5φ
3864.2	10ψ	3132.9	4φ	2717.4	4φ
3798.4	10ψ	3132.7	4φ	2684.2	4ψ
3688.4	10χ	3111.0	4φ	2681.5	4ψ
3614.4	4σ	3092.2	4φ	2673.4	4ψ
3524.7	6χ	3087.7	6φ	2660.6	4ψ
3402.9	2χ	3077.7	6φ	2653.4	4φ
3254.8	4χ	2963.9	4φ	2646.6	4χ
3253.9	4χ	2923.5	4χ	2644.4	4χ
3244.6	1σ	2912.0	4φ	2638.9	4χ
3240.8	4χ	2903.1	6φ	2602.9	5φ
3237.96	2χ	2894.5	4χ	2600.3	5φ
3223.1	2σ	2888.3	4χ	2595.5	4φ
3209.0	2σ	2879.1	6φ
3200.4	4χ	2871.6	6ψ
3196.0	4χ	2866.8	5σ
3192.3	4χ

Exner and Haschek (loc. cit.) record the most intense lines of the arc and spark spectra of molybdenum as follows:

Arc Spectrum of Molybdenum given in following table:

Wave-length.	Intensity.
3132.70	30 u*
3170.46	20 u*
3194.11	20 u
3798.41	50 u*
3864.30	50 u
3903.11	30 u*
4411.86	20
5360.80	20 +
5506.62	50 + *
5533.21	30 *
5570.69	20 +
5751.63	20 *
5888.50	20 *
5929.00	20
[6030.80]	2
6030.87	30

Spark Spectrum of Molybdenum given in following table:

Wave-length.	Intensity.
2644.40	12
2775.47	15
2816.22	20
3635.38	20
3688.49	15
3798.41	20 u*
3864.24	20
3961.62	15
5360.80	15 +
5506.70	30 *
5533.28	20
5570.70	15 *
5888.52	15 *
5928.03	20 +
6030.89	20