Multiple Choice
Which of the following statements best describes an isotope?
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2. Atoms & Elements
Isotopes
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An atom of carbon-14 has an atomic number of 6. How many neutrons does this atom have?
A
8
B
8
C
4
D
6
E
14
Verified step by step guidance1
Identify the atomic number of the element, which is the number of protons in the nucleus. For carbon, the atomic number is 6, meaning it has 6 protons.
Recognize that the number after the element name (carbon-14) is the mass number, which represents the total number of protons and neutrons in the nucleus.
Use the relationship between mass number (A), atomic number (Z), and number of neutrons (N): \(A = Z + N\).
Rearrange the formula to solve for the number of neutrons: \(N = A - Z\).
Substitute the known values into the equation: \(N = 14 - 6\), which gives the number of neutrons in the carbon-14 atom.
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