Question

Calculating the wavelength of a spectral line, an astronomer finds the missing photon to have a wavelength of 4103.98Å. However, the astronomer also realizes the limitations of his instruments and knows he can only trust three significant figures. What element likely created this spectral line, given the wavelengths from the data table in the lab guide?

		Strontium
		Iron
		Calcium
		Hydrogen
		Helium
		Magnesium

Answer 1

The answer is Fe, Data is from www.nist.gov