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Chemistry Chapter 3: Atomic Structure Flashcards | StudBud
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Chemistry Chapter 3: Atomic Structure
Chemistry Chapter 3: Atomic Structure
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A basic review of atomic structure and history for high school chemistry.
Flashcards
26 cards
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Practice quiz
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Questions
26
Answers
1
Conclusion of Rutherford's experiments in which Au atoms were bombarded with alpha particles?
Neutrons and protons inatoms have nearly equal mass.
Positive charge of atom is concentrated in a small region.
Atoms have equal numbers ofpositive and negative charges.
Electrons in atoms arearranged in shells.
2
Correct number of protons, neutrons, and electrons in the isotope,
64
Cu?
64, 29, 35
29, 35, 29
35, 29, 27
29, 35, 35
3
Scientist who discovered the electron using cathode ray tube experiments.
Dalton
Rutherford
Bohr
Thomson
4
Sum of the number of protons and neutrons in the nucleus:
atomic number
average atomic mass
mass number
nucleus number
5
Calculate atomic mass of Cu if copper-63 is 69.17% abundant and copper-65 is 30.83% abundant.
64.0 amu
65.0 amu
64.38 amu
63.62 amu
6
Dense, positively-charged center of an atom.
centriole
orbital
isotope
nucleus
7
Determined by the relative abundance and average masses of the isotopes of the element:
atomic number
quantum numbers
average atomic mass
frequency
8
Which of the following conclusions can be drawn from J. J. Thomson's cathode ray experiments?
Atoms contain electrons.
Atoms contain protons,neutrons, and electrons.
No two electrons in oneatom can have the same 4 quantum #s
Atoms have a positivelycharged nucleus.
9
Which letter indicates the symbol of the element?
A
B
D
C
10
Subatomic particle with a relative mass of 1 amu; resides in the nucleus; neutrally-charged.
electron
voltron
proton
neutron
11
Atoms of the same element having the same number of protons, but different numbers of neutrons.
cantalope
isotope
allotrope
positrope
12
Scientist who experimented with gases; developed the first experimentally based atomic theory.
Gallileo
Democritus
Dalton
Thomson
13
All atoms of the same element have the same:
atomic number
mass number
set of quantum numbers
powerball number
14
Negatively-charged subatomic particle that has negligible mass and orbits the atomic nucleus.
electron
voltron
neutron
proton
15
How many neutrons does an atom with an atomic number 50 and a mass number
120 contain?
120
50
70
170
16
What does the number 84 in the name krypton-84 represent?
the mass number
the sum of the protons and electrons
the atomic number
its year of discovery
17
Which letter indicates the average atomic mass of the element?
B
A
D
C
18
The number of neutrons in an isotope of uranium-235?
143
235
80
92
19
Which isotope symbol contains 56 protons, 82 neutrons, 56 electrons?
82Pb
138Ba
138Pb
112Ba
20
Which letter indicates the atomic number of the element?
C
B
A
D
21
Positively-charged subatomic particle; has a relative mass of 1 amu; resides in the nucleus.
electron
voltron
proton
neutron
22
Greek philosopher who proposed a limit to the smallest particles of a substance; called atomos.
Amedeo
Dante
Dalton
Democritus
23
Which element symbol has the following subatomic particles 15 p
+
, 16 n
0
, 15 e
-
?
31P
16O
30P
15O
24
Which letter indicates the name of the element?
C
B
A
D
25
The modern periodic table is arranged in order of increasing atomic:
mass
radius
charge
number
26
Discovered a small, dense, positively charged nucleus in gold atoms.
Schrodinger
Bohr
Rutherford
Heisenberg
