CHEM 103 Lab Final Exam | Verified Exam Questions and Answers |
Latest Updated Study Material 2026
Question:
Compare frequency and wavelength
Answer:
Frequency is the quotient of the speed of light over wavelength. As frequency increases, wavelength
decreases
Question:
What happens to energy when an electron transitions from n=6 to n=2?
Answer:
Energy is released, producing a photon as the electron moves closer to the ground state
Question:
What happens to energy when an electron transitions from n=2 to n=6?
Answer:
Energy is absorbed as the electron moves to an excited state
Question:
Compare the energy of a photon to its wavelength
Answer:
Energy is inversely proportional to wavelength so when energy increases, wavelength decreases. Colours
increase in energy from red to blue
Question:
Which lithium ion has a first ionization energy that is equivalent to the third ionization energy of lithium?
Answer:
Li²?, where the orbit number (n) is 1 and the atomic number (Z) is 3
Question:
Define "hydrogen-like atom"
Answer:
When an atom only has one electron and is therefore isoelectronic with hydrogen
,Question:
What happens when the first and second ionization energy of an atom is greater than the atom's thermal
energy?
Answer:
Significant ionization in a flame would not be observed
Question:
The colours observed during flame tests are likely due to what process?
Answer:
When temperature is increased, there is more energy which causes electrons to jump from ground state to
a higher energy level (EXCITATION). As it returns to ground state, visible light is emitted.
Question:
What is the electron configuration for the transition from Na to Na*?
Answer:
[Ne]3s¹ ? [Ne] 3p¹
Question:
Candy is dissolved in water. What determines the colour of the solution?
Answer:
Some wavelengths reflect stronger than other - Light from other wavelengths are absorbed by electrons
Question:
What is the function A on a spectrometer?
Answer:
A is the amount of absorption. A larger A value means that more of the incident light is absorbed
Question:
What is plotted by the spectrometer?
Answer:
An A-wavelength graph called a spectrum
, Question:
Name (NH?)H?PO?
Answer:
Ammonium dihydrogen phosphate
Question:
Name HNO?
Answer:
Nitrous acid
Question:
Name HI
Answer:
Hydroiodic acid
Question:
Name BaCl?
Answer:
Barium chloride
Question:
Name CuCl
Answer:
Copper(I) chloride
Question:
Name Al?O?
Answer:
Aluminum oxide
Question:
Name KOH
Answer:
Potassium hydroxide
Latest Updated Study Material 2026
Question:
Compare frequency and wavelength
Answer:
Frequency is the quotient of the speed of light over wavelength. As frequency increases, wavelength
decreases
Question:
What happens to energy when an electron transitions from n=6 to n=2?
Answer:
Energy is released, producing a photon as the electron moves closer to the ground state
Question:
What happens to energy when an electron transitions from n=2 to n=6?
Answer:
Energy is absorbed as the electron moves to an excited state
Question:
Compare the energy of a photon to its wavelength
Answer:
Energy is inversely proportional to wavelength so when energy increases, wavelength decreases. Colours
increase in energy from red to blue
Question:
Which lithium ion has a first ionization energy that is equivalent to the third ionization energy of lithium?
Answer:
Li²?, where the orbit number (n) is 1 and the atomic number (Z) is 3
Question:
Define "hydrogen-like atom"
Answer:
When an atom only has one electron and is therefore isoelectronic with hydrogen
,Question:
What happens when the first and second ionization energy of an atom is greater than the atom's thermal
energy?
Answer:
Significant ionization in a flame would not be observed
Question:
The colours observed during flame tests are likely due to what process?
Answer:
When temperature is increased, there is more energy which causes electrons to jump from ground state to
a higher energy level (EXCITATION). As it returns to ground state, visible light is emitted.
Question:
What is the electron configuration for the transition from Na to Na*?
Answer:
[Ne]3s¹ ? [Ne] 3p¹
Question:
Candy is dissolved in water. What determines the colour of the solution?
Answer:
Some wavelengths reflect stronger than other - Light from other wavelengths are absorbed by electrons
Question:
What is the function A on a spectrometer?
Answer:
A is the amount of absorption. A larger A value means that more of the incident light is absorbed
Question:
What is plotted by the spectrometer?
Answer:
An A-wavelength graph called a spectrum
, Question:
Name (NH?)H?PO?
Answer:
Ammonium dihydrogen phosphate
Question:
Name HNO?
Answer:
Nitrous acid
Question:
Name HI
Answer:
Hydroiodic acid
Question:
Name BaCl?
Answer:
Barium chloride
Question:
Name CuCl
Answer:
Copper(I) chloride
Question:
Name Al?O?
Answer:
Aluminum oxide
Question:
Name KOH
Answer:
Potassium hydroxide
