Name:____________________________
Atomic Theory Test 3.1
Multiple Choice
___ 1. What is the total number of electrons in the 2p sublevel of a chlorine atom in the ground
state? (1) 6; (2) 2; (3) 3; (4) 5.
___ 2. Rutherford's model of the atom postulated the existence of (1) neutrons; (2) protons; (3) electron
orbits; (4) all of the above; (5) all of the above except 3.
___ 3. Bohr's model of the atom was based, in part, on which of the following experiments? (1) the
deflection of cathode rays by an electric field; (2) the deflection of cathode rays by a
magnetic field; (3) atomic spectra of hydrogen; (4) scattering of alpha particles.
2
1
2
___ 4. Which is the electron configuration of an atom in the excited state? (1) 1s
, 2s
; (2) 1s
,
2
1
2
2
5
2
2
2
1
2s
, 2p
; (3) 1s
, 2s
, 2p
; (4) 1s
, 2s
, 2p
, 3s
; (5) none of the above.
___ 5. The quantum theory of light states that (1) light is composed of discrete particles called
photons; (2) light is composed of discrete particles called protons; (3) light is composed of
electromagnetic radiation and travels as waves; (4) light is neither waves nor particles.
___ 6. The atomic number of an element is (1) equal to the number of isotopes of that element; (2) is
equal to the number of protons in the nucleus of an atom of that element; (3) is equal to the
number of neutrons in the nucleus of an atom of that element; (4) is equal to the number of
particles that can be found in the nucleus of an atom of that element.
___ 7. What element would professor Erbie Terbium be working with in an experiment if that
element had an atomic mass number of 72 and an atomic number of 32? (1) Ge; (2) Ca;
(3) O; (4) S; (5) none of the above.
___ 8. An analysis was carried out on an unknown element by Snoopy and Linus. They found that
the element reacted with hot water to form a basic solution which turned phenolphthalein
red. It was also determined that the element could be represented by the electron dot
symbol X . Which of the following is most likely the element? (1) K; (2) Mg; (3) Al; (4) Si.
190
___ 9. How many neutrons are in the nucleus of an atom of
Os ? (1)76; (2) 190; (3) 266; (4) 114;
76
(5) none of the above.
___ 10. Which of the following best describes the nature of light? (1) it has properties of waves
only; (2) it has properties of particles only; (3) it has properties of waves and particles; (4) it
has properties of wave propagated anti-bosons.
___ 11. Four radio stations operate on frequencies of 800 kHz, 600 kHz, 1270 kHz, and 1350 kHz.
Which radio station is broadcasting at the highest energy photons? (1) 800kHz; (2) 600kHz;
(3) 1270kHz; (4) 1350 kHz.
___ 12. How many s orbitals can exist in the 3rd. energy level? (1) 1; (2) 2; (3) 3; (4) 4; (5) 5; (1,2) 6;
Chem 1: Atomic Theory Test 3.1
1997
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