Practice exam IIIA

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1. An electromagnetic wave can be produced by
a stationary uncharged particle
a stationary charged particle
an oscillating, uncharged particle
an oscillating charged particle
any particle
2. When the wavelength of electromagnetic radiation is increased by 10 percent, the frequency of the radiation
increases by 10 percent
decreases to 10/11 its original value
decreases by 10 percent
is unchanged
3. When the frequency of electromagnetic radiation is increased by 10 percent, the energy of one photon of the radiation
is unchanged
decreases by 10 percent
increases by 10 percent
decreases to 10/11 its original value
4. A quantum number n arises in the electron-on-a-wire model because
the amplitude of the wave is restricted
the de Broglie relation contains a quantum number
the energy of a moving particle can take on any value
the wavelength on the wire can take on only certain values
the electron has an energy of zero
5. Increasing the wavelength of visible light
shifts its color towards the red end of the spectrum
increases its brightness
shifts its color towards the blue end of the spectrum
increases its saturation
causes it to grow dimmer
6. The Pauli exclusion principle
states that electrons have wavelike behavior.
limits the number of electrons that can occupy an orbital to 2.
says that all electrons in an orbital have the same set of 4 quantum numbers.
states that the ms quantum number must have values of -1/2 or +1/2.
7. Which of the following is not a property of particles?
localization
mass
velocity
effusion
diffraction
8. Which of the following electron transitions in a hydrogen atom results in the greatest release of energy?
n=3 to n=4
n=6 to n=4
n=4 to n=6
n=7 to n=5
n=1 to n=3
9. Which of the following will have the largest de Broglie wavelength?
a proton moving at 1000 m/s
an electron moving at 10000 m/s
an electron moving at 1000 m/s
a proton moving at 10000 m/s
a hydrogen atom moving at 10000 m/s
10. Which of the following statements about d atomic orbitals is true?
d orbitals have a spherical shape.
d orbitals are less penetrating than s and p orbitals in the same shell.
d orbitals have high amplitude at the nucleus.
The probability of finding a d orbital electron at the nucleus is high.
d orbitals are better at shielding outer electrons than s and p orbitals in the same shell.
11. Which series of quantum numbers describes the highest occupied orbital in a ground state mercury atom?
n=6, l=0
n=6, l=2
n=5, l=2
n=4, l=3
n=6, l=1
12. An atom of silicon in its ground state has how many electrons with quantum number l=1?
14
2
8
6
28
13. Which of the following ionization energies will be highest?
The first ionization energy of Ca
The second ionization energy of K
The second ionization energy of Ca
The first ionization energy of K
The first ionization energy of Rb
14. Isoelectronic atoms and ions have identical
electron affinity
ionization energy
electron configuration
radii
effective nuclear charge
15. Effective nuclear charge is
the charge on the nucleus experienced by an electron when the shielding effect of other electrons is accounted for
the amount of energy required to remove an electron from the valence shell when the atom is in a gaseous state
the energy released when a proton is added to the nucleus
the number of electrons that penetrate the nucleus

General Chemistry Online! Practice Exam IIIA

Copyright © 1997,1998 by Fred Senese
Comments & questions to senese@antoine.frostburg.edu
Last Revised 12/10/01.
URL: http://antoine.frostburg.edu/chem/senese/101/101-sample-exam-3a.shtml