Emissions Graphs

The unknown emission spectra belongs to the element

• Hydrogen

• Mercury

• Neon

• Sodium

All stars are composed of a mixture of elements. When these elements are heated they emit specific amounts of electromagnetic radiation, known as an emission spectrum. Each element emits a unique, identifiable, spectrum.

Using the bright-line emission spectrum chart below, identify the elements present in this modeled star (found in the line labeled “mixture”). Select all that apply

• Lithium

• Strontium

• Cadmium

What gases are in the unknown mixture?

Select all that apply

• Gas A

• Gas B

• Gas C

• Gas D

Which element(s) is/are found in the star's spectra below?

• Hydrogen only

• Hydrogen & Helium

• Calcium only

• Hydrogen & Calcium

Which elements are in the unknown sample?

• A and B
• B and C
• A and D
• B and D