Copper-65 is an isotope of copper, which means it has a specific number of protons and neutrons. Copper (Cu) has an atomic number of 29, which means it has 29 protons in its nucleus. The number of neutrons can be determined by subtracting the atomic number from the mass number of the isotope.
The mass number for Copper-65 is 65. Therefore, to find the number of neutrons, we perform the following calculation:
Number of Neutrons = Mass Number – Atomic Number
Number of Neutrons = 65 – 29 = 36
So, Copper-65 has 29 protons and 36 neutrons.