Which of the following isotopes has the same number of neutrons as nitrogen-15 (N-15)?

• A. Boron-11 (B-11)
• B. Carbon-14 (C-14)
• C. Oxygen-17 (O-17)
• D. Fluorine-19 (F-19)

Answer: (C)

Verified step by step guidance

1. Identify the number of neutrons in nitrogen-15 (N-15). The number of neutrons is given by the formula: \(\text{Neutrons} = \text{Mass number} - \text{Atomic number}\). For nitrogen, the atomic number is 7, so calculate \$15 - 7$.
2. Calculate the number of neutrons for each isotope option using the same formula: \(\text{Neutrons} = \text{Mass number} - \text{Atomic number}\). You will need the atomic numbers for boron (5), carbon (6), oxygen (8), and fluorine (9).
3. For Boron-11 (B-11), calculate \$11 - 5$ to find its neutrons.
4. For Carbon-14 (C-14), calculate \$14 - 6$ to find its neutrons.
5. For Oxygen-17 (O-17), calculate \$17 - 8\( to find its neutrons, and for Fluorine-19 (F-19), calculate \)19 - 9$. Compare these values to the number of neutrons in nitrogen-15 to determine which isotope has the same number of neutrons.