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Isotopes
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Isotopes
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2. Atoms and the Periodic Table / Isotopes / Problem 1
Problem 1
The chemical symbol of the element is represented by X in the atoms given below:
130
56
X
128
54
X
139
57
X
126
52
X
130
54
X
Determine which atoms have an equal number of neutrons.
A
130
56
X,
128
54
X, and
126
52
X
B
130
56
X,
128
54
X, and
139
57
X
C
128
54
X,
139
57
X, and
126
52
X
D
139
57
X,
126
52
X, and
130
54
X
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