CHEM 162 TEST 1 QUESTIONS AND
ANSWERS
The speed of light - Correct Answers -3.00e8 m/s
Why is it called black body radiation? - Correct Answers -Because the objects studied
appear black before heating
What is the difference between an orbit in the Bohr model of the hydrogen atom
and an orbital in the quantum mechanical model? - Correct Answers -Bohr proposed
that the electron in the hydrogen atom
moves in a well-defined circular path around the nucleus (an orbit). In the quantum-
mechanical model, no effort is made to describe the motion of the electron. An orbital is
a wave function related to the probability of finding the electron at any point in space.
The longest wavelength is associated with the _______ __________. The lowest
frequency is associated with the ________ _________. - Correct Answers -1. lowest
frequency
2. lowest energy
Emits or absorbs energy?
1. n=3 --> n=1
2. n=2 --> n=4 - Correct Answers -1. emits
2. absorbs
What is the designation for the subshell with n=5 and l=1? - Correct Answers -5p
How many orbitals are in the p subshell? - Correct Answers -3 because it can hold 6
electrons, and there are two electrons for every orbital.
Democritus - Correct Answers -Greek philosopher that said atoms differed only in size
and shape. Concept of "no cut" atoms was developed
Why is the Hydrogen spectrum simpler than Neon's, etc. ? - Correct Answers -Hydrogen
has less electrons than neon, and therefore less combinations to create a spectrum
Heisenberg - Correct Answers -The Uncertainty Principle: The more precisely the
momentum of a particle is known, the less precisely its position is known
ANSWERS
The speed of light - Correct Answers -3.00e8 m/s
Why is it called black body radiation? - Correct Answers -Because the objects studied
appear black before heating
What is the difference between an orbit in the Bohr model of the hydrogen atom
and an orbital in the quantum mechanical model? - Correct Answers -Bohr proposed
that the electron in the hydrogen atom
moves in a well-defined circular path around the nucleus (an orbit). In the quantum-
mechanical model, no effort is made to describe the motion of the electron. An orbital is
a wave function related to the probability of finding the electron at any point in space.
The longest wavelength is associated with the _______ __________. The lowest
frequency is associated with the ________ _________. - Correct Answers -1. lowest
frequency
2. lowest energy
Emits or absorbs energy?
1. n=3 --> n=1
2. n=2 --> n=4 - Correct Answers -1. emits
2. absorbs
What is the designation for the subshell with n=5 and l=1? - Correct Answers -5p
How many orbitals are in the p subshell? - Correct Answers -3 because it can hold 6
electrons, and there are two electrons for every orbital.
Democritus - Correct Answers -Greek philosopher that said atoms differed only in size
and shape. Concept of "no cut" atoms was developed
Why is the Hydrogen spectrum simpler than Neon's, etc. ? - Correct Answers -Hydrogen
has less electrons than neon, and therefore less combinations to create a spectrum
Heisenberg - Correct Answers -The Uncertainty Principle: The more precisely the
momentum of a particle is known, the less precisely its position is known
