Here's how to determine the number of protons, neutrons, and electrons in the beryllium-10 isotope (¹⁰Be):

* Protons: The number of protons defines the element. Beryllium (Be) always has 4 protons.

* Neutrons: The atomic mass number (10 in this case) represents the total number of protons and neutrons. To find the number of neutrons, subtract the number of protons from the mass number: 10 - 4 = 6 neutrons.

* Electrons: In a neutral atom, the number of electrons is equal to the number of protons. So, ¹⁰Be has 4 electrons.

Summary:

* Protons: 4

* Neutrons: 6

* Electrons: 4