Boron-10 is an isotope of boron that has an atomic number of 5. The atomic number indicates the number of protons in the nucleus of an atom. For boron, this means it has 5 protons.
To find the number of neutrons in an isotope, we use the formula:
Number of Neutrons = Atomic Mass – Atomic Number
The atomic mass of boron-10 is approximately 10 (as indicated by the name of the isotope). Therefore, we can calculate the number of neutrons as follows:
Number of Neutrons = 10 (atomic mass) – 5 (atomic number) = 5 neutrons.
So, the answer is c) 5 neutrons.