1) what is the electron configuration of an electrically neutral atom of sodium?
2) what is the electron configuration of an electrically neutral atom of neon?
3) what is the electron configuration of an electrically neutral atom of oxygen?

1) 1 s2 2 s2 2 p6 3 s1

2) 1 s2 2 s2 2 p6

3) 1 s2 2 s2 2 p4

Explanation:

1) Sodium is a element with 11 electrons in 3 levels of energy

2) Neon is a element with 10 electrons in 2 levels of energy

3) Oxygen is a element with 8 electrons in 2 levels of energy

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.