Name _________________
1.
and
What is an Isotope?
Date: ___________
are similar in that they both have the same
A) mass number
C) number of neutrons
B) atomic number
D) nuclear charge
2. Isotopes of an element must have different
A) atomic numbers
C) numbers of protons
B) mass numbers
D) numbers of electrons
3. Atoms of different isotopes of the same element differ in their total number of
A) electrons
C) protons
4. Atoms of
A)
B)
C)
D)
16O, 17O,
B) neutrons
D) valence electrons
and 18O have the same number of
neutrons, but a different number of protons
protons, but a different number of neutrons
protons, but a different number of electrons
electrons, but a different number of protons
5. Each diagram below represents the nucleus of a different atom.
Which diagrams represent nuclei of the same element?
A) D and E, only
B) D, E, and Q
C) Q and R, only
D) Q, R, and E
6. Which isotopic notation represents an atom of carbon-14?
A)
68C
B)
86C
C)
6 14C
7. What is the total number of neutrons in an atom of
A)
B)
D)
146 C
?
C)
D)
8. Which notation represents an atom of sodium with an atomic number of 11 and a mass number of 24?
A)
B)
C)
D)
9. Which two particles are isotopes of the same element?
A)
C)
B)
D)
10. Which diagram represents the nucleus of an atom of
A)
B)
C)
?
D)
11. Which particles are isotopes of each other?
A)
B)
C)
D)
What is an Isotope?
12. What is the total number of protons and neutrons in the nuclide
A) 35
B) 45
C) 80
?
D) 115
13. The table below gives information about the nucleus of each of four atoms.
How many different elements are represented by the nuclei in the table?
A) 1
B) 2
C) 3
D) 4
Answer Key
What is an Isotope
1.
A
2.
B
3.
B
4.
B
5.
B
6.
D
7.
B
8.
A
9.
C
10.
B
11.
A
12.
C
13.
B