Nitrogen has two relatively stable isotopes: ¹⁴N and ¹⁵N. Determine the number of protons and neutrons in each isotope. (Recall: nitrogen has an atomic number of 7.)

• A. ¹⁴N: 7 protons and 7 neutrons;
  ¹⁵N: 8 protons and 7 neutrons.
• B. ¹⁴N: 7 protons and 7 neutrons;
  ¹⁵N: 7 protons and 8 neutrons.
• C. ¹⁴N: 8 protons and 7 neutrons;
  ¹⁵N: 8 protons and 7 neutrons.
• D. ¹⁴N: 4 protons and 8 neutrons;
  ¹⁵N: 7 protons and 7 neutrons.

Answer: (B)