Multiple Choice
Isotopes of an element differ in their:
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4. Atoms and Elements
Isotopes
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Which nuclide has 18 neutrons?
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Verified step by step guidance1
Recall that the number of neutrons in a nuclide is given by the difference between the mass number (A) and the atomic number (Z): \(\text{Number of neutrons} = A - Z\).
Identify the atomic number (Z) for each element from the periodic table: Chlorine (Cl) has Z = 17, Potassium (K) has Z = 19, and Calcium (Ca) has Z = 20.
For each nuclide, subtract the atomic number from the mass number to find the number of neutrons. For example, for \(^{35}\mathrm{Cl}\), calculate \$35 - 17$.
Compare the calculated number of neutrons for each nuclide to the target number, which is 18 neutrons.
Select the nuclide whose calculation results in 18 neutrons as the correct answer.
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