Answer: Neutrons = 0
Protons = 1
Electrons = 2
Explanation: The formula for hydride is H- it is an ion.
The number of protons is the atomic number of Hydrogen which is 1.
The number of neutrons can be calculated by subtracting the Atomic mass to its Atomic number
So 1 - 1 = 0
Since it is an ion, hydride gains 1 electron as indicated by its charge so the number of electrons is equal to 2.