The atomic number of manganese (Mn) is 25. What's the electron configuration for manganese? Question options:

A)

[Ar] 3d5 4s2

B)

[Ne] 3d7

C)

[Ne] 4s2 3p5

D)

[Ar] 3s5 4p2

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.