Multiple Choice
Which of the following is the correct symbol for the carbon isotope that contains seven neutrons?
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2. Atoms & Elements
Isotopes
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Vanadium (V) has two naturally occurring isotopes: V-50 and V-51. How many neutrons are present in the isotope V-51?
A
51
B
23
C
28
D
50
Verified step by step guidance1
Identify the isotope notation: V-51 means the isotope of Vanadium has a mass number (A) of 51.
Recall that the mass number (A) is the sum of protons (Z) and neutrons (N) in the nucleus: \(A = Z + N\).
Determine the atomic number (Z) of Vanadium, which is the number of protons. Vanadium has an atomic number of 23.
Rearrange the formula to find the number of neutrons: \(N = A - Z\).
Substitute the values: \(N = 51 - 23\), which gives the number of neutrons in the isotope V-51.
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