Elements can be identified with a spectroscope, which is a machine that separates white light into a spectrum of colors. Element identification is possible with this machine because each element has a unique emission spectrum. Which statement BEST explains why there is a unique emission spectrum for each element?
Final Exam Review: Concepts and Calculations

Quiz
•
Chemistry
•
9th - 12th Grade
•
Medium
Michelle Anderson
Used 6+ times
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18 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Light in the visible light spectrum has too little energy to move the electrons of an atom.
Light in the visible light spectrum only has enough energy to move electrons to a new orbit.
Light in the visible light spectrum only has enough energy to remove a proton from an atom.
Light in the visible light spectrum has too much energy to move protons away from the nucleus.
2.
DRAG AND DROP QUESTION
1 min • 5 pts
Element identification with a spectroscope is possible because each element has a unique emission (a) . This is because the electrons in each element follow unique (b) between (c) levels which cause the unique (d) of (e) .
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The model shows an electron moving from its excited state to its ground state. What happens when the electron in the excited state at energy level 2 moves to its ground state in energy level 1?
energy is released by emitting a photon
energy is released by absorbing an electron
energy is absorbed by absorbing a photon
Energy is absorbed by emitting an electron.
4.
REORDER QUESTION
1 min • 1 pt
A student reads that a gamma ray is more likely to cause damage to living tissue than a radio wave. She believes this claim based on her knowledge of wavelengths and the energies associated with them. Help support this claim by ordering the wavelengths from shortest to longest.
Gamma
X-ray
Ultraviolet
Visible
Radio
5.
DRAG AND DROP QUESTION
1 min • 1 pt
This chemical reaction represents the reaction of potassium iodide and lead nitrate to form lead iodide and potassium nitrate. When correctly balanced, the coefficient for lead iodide will be...
Kl + Pb(NO3)2 → (a) Pbl2 + KNO3
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Predict the products for the following reactants in a single replacement reaction. Na + MgCl₂ -->
NaCl + Mg
NaCl2 + Mg
NaMgCl₂
NaMg2 + Cl
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which statement BEST supports the conclusion that a chemical reaction occurred after mixing sodium bicarbonate (NaHCO3) and distilled water (H2O)
A change in temperature
The solution dissolves in the solvent
bubbles formed from stirring it
No change in color
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