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