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Atomic Structure 2023 Flashcards | StudBud
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Atomic Structure 2023
Atomic Structure 2023
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A basic review of atomic structure and history for high school chemistry.
Flashcards
30 cards
F
Practice quiz
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Host live
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Questions
30
Answers
1
Sum of the number of protons and neutrons in the nucleus:
mass number
quantum number
atomic number
84
2
Scientist who proposed the planetary model. Electrons orbit nucleus in energy levels:
Thomson
Bohr
Rutherford
Democritus
3
Negatively-charged subatomic particle that has negligible mass and orbits the atomic nucleus.
electron
neutron
proton
voltron
4
Scientist who discovered the electron using cathode ray tube experiments.
Thomson
Dalton
Bohr
Rutherford
5
How many neutrons does an atom with an atomic number 50 and a mass number 120 contain?
170
120
50
70
6
Atoms of an element can have a different number of neutrons.
False
True
7
Correct number of protons, neutrons, and electrons in an isotope of lead,
208
Pb? ( atomic # 82)
82, 126, 86
82, 126, 208
82, 126, 82
82, 208, 82
8
Subatomic particle with a relative mass of 1 amu; resides in the nucleus; neutrally-charged.
neutron
electron
proton
voltron
9
Which isotope symbol contains 56 protons, 82 neutrons, 56 electrons?
209Po
131Xe
138Ba
208Pb
10
Correct number of protons, neutrons, and electrons in the isotope,
64
Cu?
29, 35, 29
64, 35, 31
35, 29, 27
29, 35, 64
11
Scientist who developed the experimentally based atomic theory.
Gallileo
Democritus
Thomson
Dalton
12
Ions differ in number of which subatomic particle?
electrons
protons
neutrons and electrons
neutrons
13
The particles that are found in the nucleus of an atom are _______.
protons only
protons and neutrons
electrons only
protons and electrons
14
The smallest particle of an element that retains the properties of that element is a(s) _______
proton
neutron
atom
electron
15
How many protons and neutrons does an atom with atomic number 50 and mass number 125 contain?
50 protons and 50 neutrons
50 protons and 175 neutrons
50 protons and 75 neutrons
50 protons and 125 neutrons
16
All atoms of the same element have the same:
set of quantum numbers
atomic number
powerball number
mass number
17
Which of the following was a component of Dalton's atomic theory but had to be revised?
atoms are always in motion
all atoms of an element are identical
2 of these answers are correct
atoms are indivisible
18
Dense, positively-charged center of an atom.
isotope
nucleus
centriole
orbital
19
Atoms of the same element having the same number of protons, but different numbers of neutrons.
positrope
cantalope
isotope
allotrope
20
What does the number 84 in the name krypton-84 represent?
its year of discovery
the atomic number
the sum of the protons and electrons
the mass number
21
Conclusion of Rutherford's experiments in which Au atoms were bombarded with alpha particles?
Electrons in atoms arearranged in shells.
Atoms have equal numbers ofpositive and negative charges.
Neutrons and protons inatoms have nearly equal mass.
Positive charge of atom is concentrated in a small region.
22
Whose model is called the plum-pudding model?
Thomson
Bohr
Rutherford
Dalton
23
Which element symbol has the following subatomic particles 15 p
+
, 16 n
0
, 15 e
-
?
16O
31P
27Al
46P
24
The number of neutrons in an isotope of uranium-235? Atomic number is 92.
235
92
80
143
25
Atoms of the same element can have a different number of protons.
True
False
26
How is it that atoms are neutral?
all particles are equal
neutrons = protons
electrons = neutrons
electrons = protons
27
Which of the following conclusions can be drawn from J. J. Thomson's cathode ray experiments?
Atoms have a positivelycharged nucleus.
Atoms contain electrons.
Atoms contain protons,neutrons, and electrons.
No two electrons in oneatom can have the same 4 quantum #s
28
What is the mass number of an atom with 7 protons, 8 neutrons, and 7 electrons?
14
22
15
7
29
Positively-charged subatomic particle; has a relative mass of 1 amu; resides in the nucleus.
proton
electron
neutron
voltron
30
Discovered a small, dense, positively charged nucleus in gold atoms.
Schrodinger
Bohr
Heisenberg
Rutherford
