Chemistry

Question Analysis
This question tests the student's ability to calculate the number of neutrons in an isotope given the atomic number and mass number.

Key Concept Explanation
The number of neutrons in an isotope is calculated by subtracting the atomic number (Z) from the mass number (A).

Step-by-step Solution
1. Identify the atomic number (Z) and mass number (A): Z = 13, A = 27.
2. Calculate the number of neutrons: 27 - 13 = 14.
3. Ther...