Chemistry Standard 2, objective 1
a1. Which graph most correctly represents the relationship between wavelength and energy?
5x10-19 4x10-19 Energy 3.3x10-19 2.8x10-19
4x10-7 5x10-7 Wavelength 6x10-7 7x10-7
a2. What is the relationship between wavelength and energy?
A. longer wavelengths have higher energy
B. shorter wavelengths have lower energy
C. shorter wavelengths have higher energy
D. There is no relationship between energy and wavelength
a3. Which statement best describes the relationship between wavelength and energy?
A. Inverse relationship—one goes up and the other goes down
B. Direct relationship—if one increases so does the other
C. Proportional relationship—they both are equal
D. Unrelated—energy does not relate to wavelength
b4. Quantum theory states that spectral emissions are related to energy levels of electrons. What would cause quantum theory to change?
A. when scientists are able to prove the structure of an atom beyond a doubt.
B. when data shows electron energy levels are not related to light wavelengths.
C. when non-scientists are able to understand the emission of alpha particles.
D. when quantum jumps between electron levels are precisely measured.
Use this paragraph to answer the next four questions.
d5. From the paragraph above, which sentence supports the inference that spectra could be used to identify a substance?
A. 1
B. 2
C. 4
D. 5
b6. Which would be the best title this reading?
A. Properties of Hydrogen Atoms
B. The Nature and Structure of the Atom
C. Quantum Energy and Light Emissions
D. Using Electrical Currents in the Laboratory
b7. What is another simpler way to say sentence #5?
A. The energy released by an atom is equal to the energy gained.
B. Changes in energy must match an atom in size and amount of radiation found inside the electrons.
C. For an atom, changes on the outside must be the same as the energy inside.
D. The frequencies of radiation released from any individual atom must be proportional to the quanta of energy released from internal electron movement.
c8. Which is the best example that could be given for sentence #1?
A. A fire burning radiates light and heat.
B. The nuclear reactions on the Sun’s surface.
C. A neon light glows with an orange light.
D. A camera produces an image on film.
c9. What do the different colors in a spectrum emitted by an electron correlate to?
A. The element’s atomic number and the number of protons it has
B. The movement of an electron between energy levels
C. The spin of the electrons in their ground state orbital
D. The frequency of the electron’s ground state
5x10-19 4x10-19 Energy 3.3x10-19 2.8x10-19
4x10-7 5x10-7 Wavelength 6x10-7 7x10-7
violet red
c10. Starting at the left side, which is the correct order you would write the colors on the continuum above?
A. Red, Orange, Yellow, Green, Blue, Indigo, Violet
B. Blue, indigo, Green, Red, Orange, Violet, Yellow
C. Red, Violet, Indigo, Blue, Green, Yellow, Orange
D. Violet, Indigo, Blue, Green, Yellow, Orange, Red.
c11. Which color of light emitted by a photon would have a wavelength that correlates with the most energy?
A. Red, because red has the longest wavelength
B. Violet, because violet has the longest wavelength
C. Red, because red has the shortest wavelength
D. Violet, because violet has the shortest wavelength
d12. Spectral emissions from stars are analyzed and compared to emissions from elements on Earth. Scientists conclude that stars are made from certain elements matching the spectra. What assumption are scientists making?
A. atoms behave in the same way in all parts of the universe.
B. modern technology can find solutions to old questions.
C. stars are made of the same elements no matter where they are found.
D. spectral emissions are the only way to analyze objects as far away as stars.
d13. An unknown mineral has been found. A scientist thinks it might have potassium in it. What procedure would help identify the potassium?
A. Heat the mineral and analyze the light given off.
B. Dissolve the mineral and see if potassium is left.
C. Check the atomic weight of potassium on the periodic table.
D. Draw a sample of a potassium atom and an isotope.
The known spectrums of 4 elements are shown below.
An unknown sample’s spectrum:
d14. What elements are most likely present in the unknown sample?
A. Calcium and Hydrogen
B. Calcium and Iron
C. Hydrogen and Iron
D. Iron and Magnesium
Key
1. B
2. C
3. A
4. B
5. B
6. C
7. A
8. C
9. B
10. D
11. D
12. A
13. A
14. D