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18 questions
True or False: The ground state is the highest energy state of an atom.
True
False
What is the light that you can see called?
observatory light
ultraviolet light
visible light
infrared light
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”).
Lithium and cadmium are in the mixture. Strontium is not in the mixture.
Lithium and strontium are in the mixture. Cadmium is not in the mixture
Cadmium and strontium are in the mixture. Lithium is not in the mixture
All of the shown elements are present in the mixture.
The unknown emissions spectra belongs to the element
Hydrogen
Mercury
Neon
Sodium
The unknown emissions spectra belongs to the element
Hydrogen
Mercury
Neon
Sodium
Which element(s) is/are found in the star's spectra below?
Hydrogen only
Hydrogen & Helium
Calcium only
Hydrogen & Calcium
If an electron moves from n=4 to n=2 it ____
absorbs energy
releases energy
Look carefully at the picture. It shows an electron in the excited state on the left, and the electron returning to its ground state on the right. When the electron return to the ground state it emits a_______________________.
blast of cold air
electrostatic charge
proton
photon (light)
The picture shows an atom in the ground state absorbing energy and the electron jumps to the excited state. Which state has higher energy?
Ground State
Excited State
Each element produces its own pattern of emission spectra lines because each element has its own distinct
Speed of light
Electron configuration
Number of neutrons
None of these
The unknown emissions spectra belongs to the element
Hydrogen
Mercury
Neon
Helium
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