Ions are atoms or groups of atoms that have gained or lost electrons gained or lost protons gained or lost neutrons undergone radioactive decay different numbers of protons and neutrons in the same atom

more info ? ? i don't understand what the question is

explanation:

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.