Anyone guys down to start a convo

The continuous release of nuclear energy caused when one fission reaction triggered more nuclear reactions is a

Iron (3) oxide will decompose in the presence of hydrogen gas and heater to produced iron and digydrogen monoxide white a balanced chemical equation

How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123