Final answer:
Without the element symbol, the exact isotope cannot be identified, but in general, the number of neutrons is found by subtracting the atomic number from the mass number, and the electrons equal the protons in an electrically neutral atom.
Step-by-step explanation:
The isotope mentioned in the question seems to have 17 protons, 20 neutrons, and 17 electrons based on the details provided. However, the isotope is not specifically named in the question, which makes it difficult to directly confirm these numbers. Isotopes are variants of a particular chemical element that differ in neutron number, though they have the same number of protons.
Typically, isotopes are represented with the element symbol followed by the mass number, for example: ¹⁹F, where the atomic number (protons) would be 9, the mass number (protons plus neutrons) would be 19, and the electrons would be equal to the number of protons in a neutral atom. The exact isotope cannot be determined without the element symbol. In general, to determine the number of protons, neutrons, and electrons in an isotope, you would subtract the atomic number from the mass number to get the number of neutrons, and match the number of electrons to the number of protons if the isotope is neutral.