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Atomic Structure - Isotopes
Test Description: Review of Atomic Structure - Isotopes: High School Chemistry
Instructions: Answer all questions to get your test result.
1) Atoms of different isotopes of the same element differ in their total number of
A
valence electrons
B
protons
C
neutrons
D
electrons
2) The nucleus of an atom of cobalt-58 contains
A
27 protons and 32 neutrons
B
27 protons and 31 neutrons
C
60 protons and 60 neutrons
D
59 protons and 60 neutrons
3) Isotopes of an element must have different
A
atomic numbers
B
number of protons
C
mass numbers
D
number of electrons
4) Atoms of the same element that have different numbers of neutrons are classified as
A
charged nuclei
B
charged atoms
C
isomers
D
isotopes
5) What is the structure of a krypton-85 atom?
A
36 electrons, 36 protons, and 49 neutrons
B
36 electrons, 36 protons, and 85 neutrons
C
49 electrons, 49 protons, and 85 neutrons
D
49 electrons, 49 protons, and 49 neutrons
6) A neutral atom with 6 electrons and 8 neutrons is an isotope of
A
nitrogen
B
carbon
C
oxygen
D
silicon
7) What is the total number of neutrons in an atom of Pb-207?
A
207
B
125
C
289
D
82
8) Which isotope contains the greatest number of neutrons?
A
Potassium-39
B
Argon-40
C
Calcium-41
D
Chlorine-37
9) The nucleus of which atom contains 48 neutrons?
A
S-32
B
Cd-112
C
Rb-85
D
Ti-48
10) In which two atoms do both nuclides contain the same number of neutrons?
A
Ne-20 and Ar-40
B
Cu-65 and Zn-65
C
C-14 and O-16
D
Mg-24 and Mg-26
*select an answer for all questions
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